^^^I agree. Fandom dynamics are interesting for sure. In my experience, the Zutarians I know tend to be older - over 30 - but that's just my experience. I even know a Zutarian in her 50s! I think, if there were an accurate poll, you'd probably see most ships have a wide age range supporting them. I'm not sure that there's one particular ship with younger fans than the other - at least, not from what I've seen here and in real life.
Btw, I'm a girl, and yep, I'm a Zutarian. But as for who I would date? Like Amira said, you'd have to age 'em 15 or 16 years, but I'd go for Sokka. No question in my mind. Sokka all the way. He's darn-near the perfect guy.