PvP main focus I like fast aggressive gameplay also big numbers :)
Warrior, Rogue, or Mage. Do you want 1-2 shotting? Warrior. Do you want to never get hit and cast spells? Mage Do you never want to lose because you can reset every fight? Rogue.
I see you are an orc If you want to punt gnomes then the answer is Windfury!! You will definetly have the most fun as shaman as leveling in pvp and in STV walk on water self heals windfury for everyone purge earth shock frost shock chain lightning totems ghost wolf
Your avatar makes me think... Warrior!