Hearthpwn

Its so tough to rank them. They all seem pretty balanced for the most part and they all have their own ways of pulling out epic combos or experiencing disappointing draws.

As far as my personal record goes, I've killed as the priest when I'm not commentating and can fully focus on the game, except when it comes to druids. I've had some trouble with them. I've had the easiest time against rogues and warlocks, and the paladin offers a nice challenge. Mages AOE potential crushes beast focused hunter decks, but has trouble with mana crystal/legendary focused druid decks.

I really think everyone's list will differ quite greatly. Here's mine.

Top Tier (its too tough to number them, they are all so close)

Priest, Hunter, Druid

Middle Tier

Mage, Paladin, Shaman

Lower Tier

Rogue, Warrior, Warlock