Primary

 Intelligence
 Strength
 Agility

Damage

 Physical Damage
 Elemental Damage
 Melee Damage
 Ranged Damage
 Fire Damage
 Ice Damage
 Light Damage
 Critical Damage
 Armor Penetration

Defensive

 Health
 Mana
 Armor
 Resistance
 Dodge
 Tenacity
 Life Steal
 Mana Steal
 Spell Vamp

Miscellaneous

 Move Speed
 Attack Speed
 Projectile Speed
 Cast Rate
 Jump Force
 Range
 Melee Range

Critical Damage

Critical Damage occurs when hitting a target's critical area. Critical Damage is the preferred form of bonus damage utilized by the Hunter and Rogue.

Critical Damage bonuses do not affect damage done by Mage-like Abilities, which always remain at +50% damage for critical hits. Builds that stack  Intelligence leave themselves more vulnerable to critical hits, due to having a larger head.