I would dearly love to be Matsuri-chan from Souryuuden. ...I mean, who wouldn't want to have four dragon kings at her beck and call?

(Okay, I know it's cheating to link a picture from the novels rather than the anime, but I couldn't resist the CLAMP art.)

As for someone whom I actually resemble...the closest I can think of is the main character from Read or Die, though even I am not THAT obsessed. Second choice would be Meiko from Marmalade Boy.