Guild Wars 2

Considering there are 8 stats (Power, Precision, Vitality, Toughness, Condition damage, Critical damage, Magic Find, and Healing power), there are 168 possibilities to combine three of these stats in a way so that one of the three is dominant (the way it is now).

Since magic find and healing power assume a rather different role (read: is useless for most classes and builds), even without those stats, there are still 60 possibilities. 60.

To recap, here are the available stat affixes in PvE:
Craftable:
Carrion (condition damage, power, vitality)
Berserker (power, precision, critical damage)
Cleric (healing power, power, toughness)
Valkyrie (power, critical damage, vitality)
Explorer (magic find, power, precision)
Knight (toughness, power, precision)
Rampager (precision, condition damage, power)
Non-craftable:
Rabid (condition damage, precision, toughness)
Shaman (toughness, condition damage, healing power)
Soldier (power, toughness, vitality)

In PvP, some affixes are a little bit different (Valkyrie for example is toughness + healing power instead of vitality), and there is also the celestrial thing.

For crafting, I would have preferred it if each refinement component only adds one stat, and for PvP an amulet/ring/ring combination, each of which adds one stat. Having one item dictate over 90 % of your stats just seems odd to me.