Don't ask me why, but Harry there makes me think of Simba in the Lion King. Guess it have something to do with cuteness. Ginny looks good, so does Fleur and Bill. And I really like your Colin, he just seems like the kid next door you suddenly found out was a real pain. Perfect!
I commented on you other one, now I'm doing this one! Again, I love them all! But in particular I like Lockhart (amazingly ostentatious!), Unbridge (deliciously evil-looking), Kreacher (SO COOL), Fleur (enchanting!), and Slughorn (<3 his mustache!)