Burton's Characters compared to Carroll's Book

In Tim Burton's movie he makes Johnny Depp's character the "Mad Hatter" stand out more and have a bigger part than Alice in the movie. When in the book Alice has a bigger part and the Mad Hatter has a very little part and isn't as important. Tim Burton seems to really like Johnny Depp, which is why I think he gave him a big part in the movie. Johnny Depp is in a lot of Tim Burton's Movies such as The Corpse Bride, Edward Scissorhands, Sweeney Todd, Charlie and the Chocolate Factory, etc.