either harry of snape! neither of them are my favorite characters but i think they're the two best ones because they have the best character development. u see both of them as they grow up and fight their demons and become adults. it's really cool how u get inside their heads through all the books/movies, u see what makes them tick, what they're afraid, what their motivations are for everything they do. and that's why i think they're the best. ^^
I'm just gonna go with Snape, because of my on-going ridiculous crush on him. Actually, there are so many good characters in this series, and it is a shame that JKR couldn't delve into all of their back stories. But Snape. Definitely.
