Most fun = Druid

Rogue and Warlock are da best atm. (Both in PVP & PVE)

however... Warlock were gimped when WOW first launched so they are the least played class, Rogue were OP in the begining but after constant buff to other class they were gimped too pre BC in pvp...

Then you see millions of QQ post in the forum, they forced the CM to promised them a super buff or they QQ more. So Rogue and Warlock over-power-ful-ness today is the results of constant QQing in the forum.

Now priest and shammy are QQing in the forum (for a few months already), if you login Priest forum you'll see endless QQ post screaming at POM/shadowfiend/shadowweaving/SW:D/Healing being nerfed. Surely for those who play a gimped priest and shammy now, dun give up hope, we can expect Overpowerfulness soon all you need to do is log into your official forum and start QQ...