Dunno if these are really weird but:
I like to talk things out to myself. I live alone, so I guess I have freedom to do that. It just helps doing that then trying to think think it through in my head. I feel like it'd be seen as odd if somebody was seeing you do it.
Another thing is I have to wash my hands before I play video games. I can't fathom how people play and eat at the same time, especially if they've been eating like Doritos or something. With all the bits on their controller. That's so gross to me.

I legit would play worse without clean hands. I guess I'm weird in the sense that I clean my hands even if they're not really dirty beforehand. Been that way for a while.