I think that Arthur Weasley is so funny when he gets totally excited about Muggle things -that so fun and sweet...

and I like McGonagall when she (in PoA) says all those kind of, well not so nice things, to Trelawny -thats a McGonagall I like

she is so cool when she is like that..also when Umbridge (in OotP) is in her class...he he respect!
But my fave is Hogwarts very own Potion Master Severus Snape...

I like his sharp-tongue, his "secret" past, and all that...