I don't hide it, but I don't play in public either. A lot of people will judge you for playing/watching Pokemon. There is this girl in my university that played Pokemon once and I heard some *** making fun of her. I don't get it actually. >:(
Yes, this post is so much win. Internet saved me ;;It's more that I don't mention it. I don't hide it, but I don't center my "me" around liking Pokemon or Anime or Video Games.
If someone asks me if I like Pokemon I'm not gonna lie. But I think that many people are still shy or I guess think it's socially unacceptable and that's why they don't mention their "nerd" hobbies/interests.
But it's kinda nice that for the past couple of years people are more and more accepting. At least thanks to the internet people that are simply shy can still meet people and make friends with hobbies(like this forum) such as theirs.