We all have our favorites, but many pick certain characters as their dominate one because of how much they like them, and not actually because of how good they are in the game. Here's an example: Kirby is my favorite character since I liked the Kirby franchise when I was younger. I began using Kirby, and I found out how much I actually like Kirby more then the other characters anyway. He has the longest jump, as far as I know. Sometimes his high jumps can take away the fun since there is no challenge when it comes to trying to get back on the land.
I am a vegetarian except when I'm eating. Favorite Brawl character: Kirby.