Marriage = Losing Identity?

I wonder,
when people get married and or grow old, does it mean they lose their identity?
I always loved comic books since I was little. And for me growing old wouldn’t change it. Countless people will comment if I show interest in comics or games (I’m an avid gamer as well, tho mostly I play Sims and Harvest Moon series). They said “but you’re getting married!” or “You’re too old for that things!”

Can’t we have hobbies? And if my hobbies happen to be comics and games, then is it a bad thing? Should I have adult hobbies like knitting?

The hell with what people said. Who cares?