"You could train your weapon or shield up to 20% and 30% respectively with <Weapon> Expertise, making a total of 100% chance to block any one hit. Now bigger armour is a lot better!"
this reminds me of the warrior from diablo 1...
somehow i think a 100% chance of blocking seems a bit unfair to say the least...
of course a way to balance that would be to make the durability of shields much much more easily affected by blocking blows...
idunno... i LOVE the idea of a parrying skill (it's beneficial to all "classes" aside from perhaps the ranger which would use it's dodge ability...) but one would have to restructure game elements to make it balanced (remember that npcs should follow the same rules as the player, thus they would use the parry skill as well)...
maybe each parry would cause a drop in stamina (but not if there's less than a 100% chance blows will be deflected... seriously, 100% chance just seems a bit too unfair... it'd make the player practically invincible when it comes to physical attacks...)? idunno...