:O This is a good question.
Of course with how obsessed I am with them it can't just be ONE song, so I made categories so this can be extra fun!!

Favorite with them both together- https://www.youtube.com/watch?v=sSYoz0JmnZo
Electric Angel (originally used Miku)
I find this song very nostalgic and it was the song that really made me fall in love with both of these characters! It started a long, long obsession... I actually thought that this was the original version of Electric Angel for a while, but it isn't.

Favorite solo Rin cover- https://www.youtube.com/watch?v=oTxyT31u4Kk
The Vampire (originally used Miku)
A more recent song than anything else on the list but this song is an absolute JAM and I love its kodocon-y theming

Favorite solo Len cover- https://www.youtube.com/watch?v=QqfZ9s-uUK0
Unravel is originally the Tokyo Ghoul opening theme
This one was hard... there's a lot of good Len covers!! I had to go with this one though because it's one of my favorite anime OPs sung by one of my favorite boys. What's there not to love? Also apparently there's a few people who have done Len covers of this song, but this one has always been my favorite since I first heard it several years ago! His voice just has this emotional quality that makes him sound like he's about to cry, which is something I really value in a song I guess lol!

Favorite famous song - https://www.youtube.com/watch?v=eSI7RsjZy1E
A classic and a bop! This song deserves all of its fame. I love playing it in Project Diva and Sekai, also.

Favorite niche song- https://www.youtube.com/watch?v=B5s7191duYc
Girl A is sung by Rin, but I didn't know that until I'd already listened to it, possibly hundreds or thousands of times. My fellow Vocaloid otaku will immediately hear the producer name siinamota, and feel a clench in their gut. A beautiful soul and talented artist lost far too soon, we can hear the pain he was experiencing in his songs, the last few things he gave to the world before it became far too painful. All of these songs are really close to my heart as a depressed person, and are a reminder to keep going no matter what, because there will be people who understand, and people who will mourn you. You simply haven't met them yet, and it shouldn't be your loss that introduces you to them.

Well given that I'm 21, dating younger is kind of bad territory. Your brain develops pretty rapidly from your late teens through your mid twenties, and as a result I already feel detached from a lot of 18 and 19 year olds. I know that sounds ridiculous to people older than me, but consider that time looks different to people of different ages! I was 18 almost 4 years ago now, which is already a 5th of my entire life. To me being 18 feels like it was a lifetime ago, and I feel like I've changed and matured in very significant ways since then. That's why I'm at a stage I think where my friends are either my exact age, or significantly older than me by 5 or more years.

That's a long way of saying "I don't want to date an 18 or 19 year old because I feel like the maturity gap there is already significant". Or it's significant enough in terms of a life partnership where I need to rely on this person and depend on them for support. In terms of a more casual arrangement or a friendship, it's a bit easier to imagine myself with someone younger than me.

As for someone older... ha ha... A few people I've already dated or had "arrangements" with since turning 18 have been way older than me... like by 5-15 years. I guess I have less inhibitions about meddling with older folks when it comes to age gaps. I do honestly find it somewhat hot as well, but I wouldn't like leaving myself open for that person to use my age as a "finality card" or "gotcha" in arguments. I think it's a risk for the older party to manipulate by going "well I just understand this better since I'm older and therefore, I'm right" and that would be what creates a power imbalance in a relationship.

I don't think power imbalances are inherent to age gap relationships between adults, but that they ARE common and that's because the power imbalance is created by the older party viewing themselves as superior in some way, or acting more like a parent than a partner.

Wow, that was certainly a ramble.

I used to do web development! I was the best at HTML and CSS, but Javascript was difficult for me to learn. I also tried Python. Everything I've ever made has been pure spaghetti, honestly, but it's something that I still might try to go back to in the future. I'm actually not super "math minded" and computer stuff confuses the hell out of me - when people start listing computer parts and specs my mind completely clocks out. That's why I feel uncomfortable building my own PC and just rely on more tech minded friends to help me buy prebuilts.

I think there's like a small but vocal group of people online who will think less of you if you admit that you find computers confusing, but the thing is, I just do!! They are confusing!! I have other things I AM good at, like writing and art. But my code is spaghetti and my PCs are prebuilt, and I don't care that I'm paying an extra fee for convenience. That's how it is on this bitch of an earth.

Honestly I feel like I always project a little bit onto custom characters I make, and they kind of gain their own little personality in my head. Each character I've made in an MMO kind of feels like an individual OC I've made. I might not explicitly roleplay as the character by my actions in the game (especially if the game has limited options for actually RPing) but in my head I'm definitely getting the vibe of the character I made. Like the cutesy short one with pink hair and white eyes and bunny ears I made in Palworld gains a bubbly, sugary personality in my head. There's also been cases where I draw art of them or actually make them into OCs that survive outside of the game they were initially created for!

I've been in poly relationships before that didn't end up well, perhaps because of my age at the time or because the person I was with who was also dating other people was quite toxic. And then I had another experience with an open relationship (only one committed romantic partnership but we were allowed to have sexual/non-committal experiences with other people) which was, honestly, a far more positive experience.

Right now actually since I'm fresh out of a relationship I've been thinking again about how I experience romance which has included some thoughts about how I experience monogamy. I have never cheated on anyone, but I can't lie and say that a big part of the relief from leaving relationships is always "God, now I can flirt with other people again" or "Thank god I'm not limited to only having sex with that one person forever anymore". I think I have some resentment about committing sexually to just one person forever, but on the other hand I like the idea of having that one emotional/romantic partner who I can always go back to.

Right now regarding polyamory I'm not sure, but I do think that I would want to seek out an open relationship again, but also that it probably(?) won't be a dealbreaker if the person wants complete monogamy, if I really really like them and we are really compatible in every other way.

Another thing is that my sexual needs are just very diverse; as a switch I am deeply attractive to both submission and dominance and it's just really hard to find one person who can be both of those things for me.

I also liked sub sharing, that was something I did before when I was in an open relationship with another dom. BDSM polyamory (in its many forms) is probably the most attractive kind of poly/open style relationship to me.

I think my favorite movie is Jojo Rabbit and the thing I don't like about it is that, although it's an extremely well executed dark drama/comedy and does being a period piece set in Nazi Germany really well in my eyes, the name of it makes it sound like a children's movie and people assume that's what it is, so I always have to explain when I say Jojo Rabbit is my favorite movie. Additionally, like I said they do the dark comedy really well and it never feels like anything but Hitler and the Nazis being the butt of the joke, but I can see "dark comedy about a boy in the Hitler Youth" and the idea of seeing 1940s Germany through that character's eyes to be a turnoff where people will not want to watch the movie out of discomfort with the concept, and won't even want to stick around to see how it's executed. It's something that I understand, but basically, I hate that my favorite movie is so easy to misunderstand and make assumptions about