Uhhhhhh my first anidol series was Love Live, which I got into around when Aqours were first being introduced (KoiAqua was recently either announced or released iirc). Muse and Nijigaku are both my absolute beloveds, though I sorta drifted away from Love Live during SIFAS main story arc 2 though I never paid much attention to the SIFAS story anyways, so I still don't know much about Shioriko/Mia/Lanzhu as charas jlkbflgjgfphosjboipsrjhtjrhpt...I haven't watched s2 of nijigaku's anime, though I do really wanna do so at some point!! (Also re: muse and nijigaku: Nico/Nozomi/Hanayo/Rin/Honoka/Maki and Ai/Kanata/Rina/Karin/Yuu/Kasumi/Setsuna my beloved, Shizuku also gets a mention for dropping the banger of the century Audrey <3 (also I do love Yohane/Hanamaru/Ruby/Dia/Mari/Riko even if I don't really touch much Aqours stuff!!)

More recently I've gotten into pole princess though!! I love seeing the inventive ways the MVs are done, and Mio Tousaka I love you sm...same with Miss Sana Murafuji she is just the definition of queen shit with that choreography in Avaricious Heroine!! And her character design and main costume are both so pretty...and also pole princess is nothing but banger after banger with its music!! I guess polpri doesn't really emphasize the idol aspect that much and is more focused on the pole dancing but it's still good!!

I do wanna watch Idoly Pride and Zombie Land Saga at some point, I've been wanting to expand my music taste a bit so hopefully getting into more series can help so jgrlk;sejgljhfg

So basically just Love Live and Pole Princess jfoeirjgioprjhosrjthsipo and idk which one I'd call my fave tbh...I still have somewhat of a soft spot for Love Live but I really hate the Love Live staff's practices with overworking the seiyuu (I never got into Superstar and I'm kinda glad I didn't cuz I feel so bad for how horrendously overworked the seiyuu are atm it's insane how much has been put on their shoulders), I wanna say maybe PolPri would be my fave...? No clue tbh JOGPTRHJOPIWRJTPTRJIHPO but I hope PolPri will do some cool stuff in the future cuz it really has the potential to be one of my fave series!! Again Miss Mio Tousaka ily

Also not directly an anidol series but has an idol character with an image song and everything: Magia Record thank you for Sayuki Fumino and Kokuho High End (stream https://www.youtube.com/watch?v=_KI1u6pC4MY&pp=ygUcbWFnaWEgcmVjb3JkIGtva3VobyBoaWdoIGVuZA%3D%3D)