WotLK Help with the Class

Hi everyone
I just wanted to ask what you think and what you think it is the best
I lvled up a warrior 80lvl
Priest (Shadow) 80lvl
And i have a pala on 66lvl
Now i have a question what you think is a good class i mean i know every class is good on its way but i mean of this 3 classes what shoud i go on in the future
I mean witch shoud i stick and learn better cuz its boring to play every class 2-3-4h then other and you dont know what you want :D
Wanted just to know witch class is how coud i say good or middle
Or you can give me some other class that i coud stick with :D (Hunters i dont like played them)

Sry for bad eng