Lol, I remember the debates about Twilight and the 'Teams'. XD
I dropped this series a long time ago (too much shoujo drama for my taste XD) but if I had to pick someone, I'd go
with Zero. Sure, he's moody and angry and just plain 'aaangst' all the time but I strongly disliked
Kaname from the beginning, something about him simply made me go 'Ah, I don't like you' - as Snicker
mentioned - he was too perfect. He's also too manipulative and scheming and his motives are still way too unclear
and shady; Zero's at least more forward and honest in his approaches, no matter how broody and angsty they may be.
So, yeah, Zero would be my pick. XD