Notice of course that I said "At it's peak," and "was." Do to constant interference from Anet the team responsible for Guild Wars' function, as well as the mass production of builds via a PvX Wiki website, the game has taken a dramatic turn for the worst.
Guild Wars' skills are constantly being "Improved" (oh please) twisting and perverting them from their original genius, into skills that make you question why they were ever made in the first place. A skill that once did additional damage to an enchanted target would now do little more then cause that target to bleed and become crippled (even if they aren't enchanted). And skills that were once used for "back up protection" or "makeshift healing" have become full scale healing and protection abilities. Unique builds that showed off ones creativity and genius are a thing of the past with everyone using the same build as everyone else.