Girls:
Tamao Suzumi from Strawberry Panic!. She's exactly the dreamer-writer-poet type I love. Intelligent, introverted, imaginative and caring :3 Also, I have troubles imagining him as a real person but I think she'd look as pretty as she does as an anime charater.. But we don't care about superficial stuff, do we?
Guys:
Hmm, you know, I have a perfect anime-guy pictured in my head right now, but I haven't come across him yet =P
Ritsuka from Loveless is kinda close, but he's too young. Maybe if he was
5 years older?

*drool* Hey, then he'd actually be as old as he already is mentally xD Though I don't really like cats. Gotta get rid of those animal-features..