There's one for the original, so here's the GX version.
Favorite Male: Tie between Supreme Emperor Jaden and Atticus/Fubuki 10join.
Favorite Female: Amazoness Tania
Honorable Mention: Yubel, who is a hermaphrodite.
Please, if you don't like the series, don't post "none GX sux roflololol othersmilies"
EDIT: Axel Brodie/Austin O'Brien beats everyone. He is the shining voice of reason in a sea of insane people.
Plus, his is the only voice in all of the 4Kids dub that isn't complete garbage.