Greetings, I'm 48 and my demographic obviously likes games, as it's my demographic that runs most of the companies that makes the games you are wondering who plays.
I like to play games, you simply might just find them dull is all.
I run two 4th edition Dungeons and Dragons groups, I own a Nintendo DS XL and a PS3 as well. Granted I like dull boring DS titles and my PS3 has no games as I use it as a media hub device.
You are only old when you give up being young.
I watch anime too, and only dull boring people tell you ANYthing is just for kids.
Even school is not just for kids. Stop learning when you feel smart enough.