I don't actively mention that I play Pokemon unless someone else brings up the topic. I've generally tried not to bring it up for years, and I don't really like to go into stores and ask about it. The stigma associated with Pokemon seems to have declined as I've aged, though, and a lot of people I know either like it themselves, played it when they were little but no longer have feelings about it either way, or simply never played it at all, so I'm more open about it than I used to be. Generally, though, my interest in Pokemon isn't really relevant to the conversations I have with people, so I don't bring it up.