I will preface this by saying that I am absolutely in the minority with probably all of these, and I hope mentioning this doesn't cause conflict :/
I'm not trying to say anything bad or rude at all about people who have these interests, these are just mainstream things that are also often special interests that I just didn't get into as a kid (or as an adult either.) None of what I say here is intended to be disrespectful or invalidating, I hope it doesn't come across that way!
I never liked video games, or had any interest in playing them. Still don't. Maybe like, once or twice a year I will play something with a friend at their house just because I want to support their interests and don't want them to feel like I don't approve of them having that interest. I have no issue at all with people liking or playing video games, or having it as a special interest, though. People always assume I'm one of those girls that looks down on gamers, but I really don't... I think there's a pretty big difference between being disinterested in something, and hating it...
Same exact thing with movies. Maybe less than 1% of the time I will find a movie that I want to watch by myself, but almost every time I see a movie it's because a friend wants to see it and I want them to enjoy the experience so I watch it with them. I don't find movies or television that enjoyable by myself, and when I do I'm incredibly picky (which is something I've posted a lot about previously.)
Another thing I was never into growing up was fictional books/movies/tv, and fandoms. Maybe I just have no imagination lol. And I didn't think anything negative about people who were into those things either, I know people can be judgmental about it but that's not the case for me. I wasn't even really aware of what fandom was until I was in college, and not until I was like a sophomore or a junior, so that was like right around the time Tumblr really became a thing (2014ish) and although I never used it myself, that was when I became very aware of that interest. I actually really don't know why I never got into anything fictional, even mainstream stuff, but it was just that nothing ever clicked with me I guess. A lot of my friends in college were really into Harry Potter, Disney, Broadway musicals, and Supernatural, particularly. So I have kind of an entry-level understanding of those things lol. Like I will kind of understand referential memes, for example.
I have always been EXTREMELY into music though, and I have a wide range of musical taste and some of it is very not mainstream.
Celebrities were another interest that everyone around me had growing up, that I never understood or liked. I have actually never had a celebrity crush, believe it or not.
N*Sync and the Backstreet Boys were the big "thing" when I was a kid and I kind of liked their music but I don't think I ever knew what any of them really looked like, at least not enough to be attracted to them. I think Justin Timberlake was the only one that I would recognize if I saw a picture, but he has been consistently mainstream for most of my life so it would be weird if I didn't lol.
I don't want to be "that person" but I seriously never liked Justin Bieber. His music or his personality. It was absurd to me how obsessed girls were with him when I was in high school and college. There was one song that came out a few years ago that I liked and I was surprised that it was him.
I was never on the One Direction bandwagon either lol but I've found out as an adult that some of them seem to be decent human beings for the most part. Just never got into their music and was weirded out by the creepy stalkerish fans.
There was another boy band that was really popular around that time, I think they were called The Wanted, and I actually loved one of their songs... but One Direction definitely outdid them in popularity and probably wiped them off the map lol because I don't think anyone a few years younger than me or more has likely heard of them... That song may have actually been a one-hit wonder but I'm not sure. I will have to look this up later.
K-Pop became really mainstream when I was a bit older and it was never really my thing either but I don't outwardly dislike it. Again, though, some fans are seriously creepy and disturbing. But I know that doesn't represent the whole fanbase.
Anime, manga, cartoons, and comic books were another thing I just never got into, but I think that goes in the "fandom" category. I occasionally liked some graphic novels though.
I've always been a self-taught artist too but I never got inspiration from anime or comics or cartoons or anything. I mostly draw portraits and animals, and sometimes realistic but usually stylized.
I was late to the party with Youtube, I think I watch Youtube way more now than I ever did when I was younger, although I have always used it as a music source. I don't like how the algorithm works though and I can see how it traps a lot of people in an echo chamber. I mostly use it for content that is either *credibly* educational, or just lighthearted and humorous (like silly commentary videos, and making fun of memes from reddit.) And background noise when I sleep. And music.
Yeah, I know that was a lot, but that was my input on this topic, since I didn't really specify last time.