This is a good question

I know that most stuff about him is ambiguous and alot of the things I like about him are mostly fanon due to this but I do love whatever canon information we have of him or whatever is hinted at.

I like that he's very caring, this is moreso a hinted at thing but if he truly didn't care about anything he would've never gone through all that trouble in the fnaf canon. He was devoted to spending 15 nights (20, depending who you ask.) In whats basically a death trap to fix what his father did. He wasn't rewarded (in living) or anything, he really could've just moved on with his life and just live with the fact that his dad is a child murderer. That would've been so easy for him to do, I mean he didnt know most of the MCI so why would it matter to him? But he didn't. He went out of his way to do it anyways. He just wanted to resolve something that wasn't even his fault when he easily could've chosen not to. I find that really interesting about him, and even if it's simply hinted at it does say alot about him personality and character wise.

I like his voice as well. It's very sweet, I know his voice is meant to sound tired and albeit depressed bit I find it charming regardless. His tone is so gentle and whispery, I'd probably melt upon hearing anything loving come out of that voice.

I love his creativity as well. His drawings in the logbook are charming, he's very skilled at what he does and I'm proud of him. I also like to think he made those trash and the gang "animatronics" (yes I know you get them from the catalog but hush.) And that's just really endearing to me that he made cute little characters out of literal garbage.

There's most definitely more, so much more that I love about Michael but I either can't think of it at the moment but really these three pieces aren't what my love for Michael is limited too, there's many things to adore about him and my appreciation for him is endless.