Q: What is it that makes them unique compared to all other classes?
A: The big ones are stances and rage. Other than warriors, only bear druids use the rage mechanic, and that is pretty much just because that form is intended to mimic warriors. Rage is an unusual resource because it is infinite over the course of minutes, but can be very limiting over the course of seconds. While the basic mechanic of rage is interesting, it has caused us lots of balance problems over the course of World of Warcraft -- sometimes in the favor of the warrior and sometimes not. It's probably time to give the mechanic another look.
Stances are intended to be a major battlefield decision for warriors, though we realize it doesn't always pan out this way. You have access to different abilities in different stances, but pay a rage cost as well as sacrificing the potential to use other abilities. More on this below.
Warriors also have some unusual mechanics like say their ability to move quickly around a battlefield, to survive massive physical damage through plate armor and Defensive Stance, and game-changing abilities like Spell Reflect.
Community Team: Warriors have quite a few abilities that are contingent on certain circumstances like Overpower and Intervene.
