http://eu.battle.net/d3/en/blog/2871091#blogBarbarian: Unleashing the Fury
Barbarians are battle-hardened, close-combat warriors. To that end, they use Fury as their resource to unleash devastating melee attacks against their foes. Fury is gained whenever the barbarian lands a successful attack, as well as when he or she is struck by an opponent. This resource depletes over time whenever the barbarian isn’t fighting, so you’ll generally want to make sure you’re at the forefront of the action, building up Fury to use stronger abilities. Fury is also gained steadily with attacks such as Bash and Cleave, while larger bursts of Fury can be generated by mighty abilities such as Leap Attack and Ground Stomp. Meanwhile, Fury-consuming abilities range from more defense-oriented skills like Threatening Shout, which reduces the damage of nearby enemies, to deadly attacks like Whirlwind, which continuously does massive damage as long as Fury persists. By managing both Fury generation and use, the barbarian can become the most brutal melee hero on the battlefield.

Demon Hunter: Balancing Hatred With Discipline
Hell-bent on seeking vengeance, the demon hunter is an agile adversary who uses advanced combat tactics to exact deadly attacks. As such, the demon hunter must manage a duo of resources: Hatred and Discipline. Hatred is a very quickly regenerating resource used to fuel an array of the demon hunter’s offensive abilities in the heat of battle, while Discipline regenerates much more slowly over time and affords the use of tactical skills, when the moment is just right for controlling opponents. For example, a Hatred skill like Bola Shot wraps around your target, exploding shortly thereafter to do heavy area-of-effect damage. On the other hand, through extensive training and careful preparation, the demon hunter uses Discipline for skills which can provide a means of keeping distance from enemies, or entrap them. Smoke Screen, a skill for the most disciplined of hunters, allows you to vanish out of sight for a brief period of time, costing a percentage of Discipline to use. The demon hunter can use their Hatred of the damned to deal direct damage, and Discipline in combat tactics to lure them into well-laid traps, hunting them mercilessly until they’re driven back to the Burning Hells.

Monk: Attuning to the Spirit
Similar to the barbarian, the monk excels at close-quarters combat. Unlike the barbarian, however, the monk doesn’t benefit from being hit by foes and cannot afford to take nearly as much damage. Instead, the monk can use Spirit to release a series of lightning-fast attacks and precisely orchestrated defensive skills, to the point of artistry. Spirit is generated through use of melee attacks and select special abilities, and does not degenerate until used by a skill that costs Spirit. This allows for powerful and poetic combos, often leaving monsters bewildered in their last breath. For instance, Spirit can be used to activate the mystical Seven Sided Strike, allowing you to dash swiftly from enemy to enemy exacting seven fluid, yet abusive attacks. Other skills, however, are available to help generate Spirit. Fists of Thunder is one of these: a series of extremely fast punches deal Lightning damage to enemies and have a chance to interrupt incoming enemy attacks. It’s within the Spirit of the monk that a truly deadly hero is beheld.
This post was edited by sylke on Aug 30 2011 01:22am