Ok, this question is a really difficult one to answer even to myself. I love Ron Weasley, but I can't consider him my favourite because there are a lot of things about him that bother me a little.
Then, I feel really identified by Hermione Granger... I'm a lot like her (almost in everything, except for the Hogwarts house), and I don't really appreciate me that much to say Hermione would be my fav. character. Yes, I love her... but I don't know... She miss a lot of things...
Surely I would say that my fav. character was and will allways be Fred Weasley. I always loved his way to be. He is like the person I always wanted to be: he's funny everytime, he always sees everything good, and he have a great connection with George (I think I would never have that connection with NO ONE). I love how he could ALWAYS make me smile even in my bad days. And he was that brave to sacrifice himself to save one person. I find it very difficult to hate something about a person like he was. So I think that's why he will always be my fav. character (R.I.P. dear Freddie :'( ).
Then, the other character who is my favorite is Luna. I'm totaly like her in all the aspects. I can see another side of the things that nobody else can see, and I'm kinda weirdo (yes, I'm a combination of Hermione and Luna... maybe like a Hermiona, 'cause I'm VERY nerdy, and moody like Hermione, but I'm strange and unique as Luna