I'm 28 years old..and my family accept the fact that I always have, and always will like Pokemon. To me that's all that matters. My buddies like Pokemon too, so we have no issues. If some random person told me I'm too old, I'd say "Nah."
I've been playing Pokemon since 1999 and although I took a few years off between 2007-2013, I've really enjoyed catching up on the games and the anime. I'm 30 now and I don't care what people think. My sister is 2 years younger and she loves Pokemon too. Actually, because I now live in China and she still lives in the UK it's been a great way/reason (if i need one) to keep in contact!
For those, in the more awkward years of your life I will say this. Don't worry about what other people have to say, do what makes you happy, whatever that maybe. If your friends don't like your hobbies, then they may not be very good friends.
I love this. Pokemon is rated E for Everyone, not E for Eleven and Under.Well I mean it's rated E... for Everyone. Everyone of all ages... :s