WOTLK mage looks amazing, all trees and the new specials seem wonderful making your choice very difficult to say the least.
I am very happy that Mages will finally become an awsome class once again and i am definitely gonna play on since the got so much versality and they seem to offer so much fun, unfortunately i can't say the same for my old class (warlock) but then again who cares since it's so easy to level and equip a new character especially on gear resets like WOTLK.
Old mage players finally got some nice things to look forward, as for new FOTM players like myself i hope this fine community will greet us warmly, once again Blizzard did a fine job and i congratulate them for it.