World of Warcraft cl question.?

I have made an arcane mage and he is now at level 85. Let me just say mages are very boring. I guess i just stuck with him because i figured i might as well get him to 85 because of how much time I've already spent. I now want to make an alt and I want to know which cl you think is the most FUN. I'm thinking healer or tank because I like dungeoning, but if someone thinks there is a really fun soloing cl out there then tell me. PS no rouges. They're fun but are a pain in the @$$ In pvp.