Brave little Arya. She stands up and fights for the weak. I love her spunk and attitude. And my other favorite character is Tyrion. Love the imp and all his craziness. I mean what's not to love about his character? Always in the middle of things. I can see him surviving through the books (well past the fifth book anyway since that is out). I can't wait to see more of these two characters and of course everyone else too.
One of the things I love about this book is that most of the characters are not clearly "good guys" or "bad guys." They have complex motivations, make good and bad decisions and are just interesting. I do like Tyrion very much!