ok i agree they could of done better with the movies.. But... i think with what they had to choose from Lupin and Sirius were wonderful. i also admit that Lupin and Sirius were supposed to be "hot" but Lupin is a werewolf and the transformations do wear him down. and Sirius was in Azkaban for 13 years that has to wear down on his looks somewhat.. as for the list someone was talking about up there..

Harry --is perfect although when he was younger he could not wear contacts (they iritated his eye) and his hair needs to be a bit more messed up but what can you do.
Ron-- i feel is also perfect..
Hermione-- Perfect except her hair needs to be a little more wild.
Both Dumbledores are Great
McGonnagal -- Awesome
Snape -- Awesome
Trelawney --Good
Hagrid -- Awesome
Filch -- Good
Olivander -- Awesome
Lockhart -- Awesome
Myrtle -- Good
Lupin -- Awesome
Sirius -- Awesome
Peter -- good
Dudley -- unforgivable<--i agree on this one.. he needs to be fatter!!

Seeing as they could only use Actors from London/Europe i think they did a wonderful job on choosing them.