Hunters:
Causing a high amount of damage in groups/raids: 26%
Grinding to 70 as fast as possible and then not being able to get a group: 22%
Killing your group in instances by pulling aggro and then Feigning Death: 22%
Mages:
Doing a high amount of damage: 26%
Ending world hunger with refreshment tables: 24%
Crowd control in instances: 17%
Priests:
Healing other players in raid or group: 50%
Doing high damage per second in shadowform: 18%
Mind controlling people and throwing them off a cliff: 12%
Rogues:
Causing a high amount of damage per second: 38%
Killing noobs or griefing other players: 21%
Crowd Control with sap and other things: 12%
Warriors:
Best tanks: 39%
Will work as tanks but aren't ideal for damage: 23%
Warriors are good for nothing, get a paladin: 16%
References:
Hunters are for
Mages are for
Priests are for
Rogues are for
Warriors are for