The three skill trees of the warrior are called arms, fury and protection. "Arms" is the favorite skill of people who want to rule in pvp and bring down a lot of enemies on the battle grounds. You will stumble upon fury warriors as well in pvp but it remains a pve skill primarily since the damage output of fury is simply higher. The skill tree "protection" has many talents that are valuable for tanks.
The MS warrior (MS = Mortal Strike), a warrior trained in two weapon combat, likes to be accompanied by a "discipline priest" in the battle grounds. Together they are almost unstoppable and the MS warrior can just ran into the heat of battle without thinking. MS Warriors carry two-handed sword most of the time. In PvE this type of warrior is also a lot of fun.

The fury warrior wields two weapons. A new skill called "Titan Grip" allows the warrior to wield two-handed weapons in each hand. Because of talent powered, numerous attacks with high crit rates the fury warrior has a very high damage output.

The protection warrior relies on skills that increase his defense rating, armor, parry- and block chance. Since he additionally carries a shield his armor bonus is outstanding. In raids such a protection skilled warrior is a must, unless substituted by a protection paladin or a feral druid. As a new phenomenon the protection warrior also deals good amounts of damage which makes it a lot easier to grind in pve.