Hell no! I'm fine with playing video games, no matter what age! The only difference between me now and me when I was 10 is that now I can appreciate pokemon for what it was worth then and now. I can play a new game and enjoy the new concepts and themes built in. Then I can play the old one while reminicing about how fun it was the first time I played and how fun it is now.
Also, since I'm older I don't need a parent to go to the store with me to get an M rated game. My parents regulated that well, and I'm glad they did because it's their job to do that.
Overall, I think that you're never too old for a game cause when you have kids of your own, you're going to want to show them what you grew up playing. I remember when I was 4 years old and my dad showed me the NES he had from his college days. He put the controller in my hands, popped in Super Mario Bros. and gave me a brief explanation of the game before letting me try it out. I'll admit I was horrible. It was new and challenging. But it's one of my favorite memories with him as a kid and it's something that I can't wait to do when I have kids, cause I'll show them that, and then Pokemon, Fire Emblem, Legend of Zelda, and Metroid, and I'll start them down their own road of video games.