11 Night Elf Druid
I believe it was towards the end of Cata that Blizzard released some numbers, and they said something like 60% of all players PvP regularly. That is pretty believable, but now I would say that number has plummeted.
PvE hotfixes = 3 hours.
PvP hotfixes = 3 weeks.
This has to stop if Blizzard wants to keep people playing for PvP.