I wouldn't say I keep it a secret... I had a couple friends who played Pokemon, but eventually, one of them started turning more towards the First-Person Shooters and Third-Person Shooters, while the other remained with RPGs and Pokemon. Suffice it to say, though I still have one person I could play Pokemon with, in my little group of friends, I rarely get to do so; even with the WiFi Connection.
I could go on a full-scale rant about FPS games, but I'll spare your eyes the lengthy wall of pink text, since I can't really be bothered and it isn't really the section to be doing it, lol
Anyway,another contributing factor to why its not that I'm keeping it a secret; no one else knows because no one else asks if I play Pokemon. I just kind of go by the idea that if they don't ask, I won't tell them because they probably don't want to know.