I'm a fan (and you should be too) because...

You can't categorize him. He's clearly ambitious, but he pulls his friends in the spotlight with him. He's articulate, but chooses "goober" as the best word to describe himself. He is, as Simon famously said, a proud man, but he wore a little girl's hope on his wrist for weeks and didn't say a word. He's cool and collected under pressure, until someone makes him laugh and he becomes a little boy. He's cocky, but he cries when fans sing his songs back to him.

His voice is similarly multi-faceted. He can make your bones shake with an insane glory note, before breaking your heart with a well-timed falsetto.

He is simultaneously both a panty-meltingly hot rock star and a guy with whom you can meet for a beer and a movie (and who'll probably cry more than you if it's a sad movie), and somehow, both of these aspects of his personality seem equally real and equally genuine.

Oh, and his music is pretty good too.