Quote Originally Posted by Enkidoh View Post
Gary Gygax did - the creator of Dungeons and Dragons, which pretty much every RPG since has utilized basic elements from - one of which is indeed, class restrictions for armour (specifically, the 'no heavy armour on mages' rule.) FFXI's manual actually stated that BLMs can't wear heavy armour because (paraphrasing) "it would otherwise interfere with their ability to concentrate".

Really, if you want to wear heavy armour, maybe you should consider a career change to a tank class methinks?
And yet nowadays you can have fantasy settings where entire races can perform magic wearing anything from commoners' clothes to nobles' finery to centurions' armor.