I bring up GW1 a lot... but I really liked how much build variety there was. It was inherent in the structure of the classes, and led to a lot of innovative builds, but GW1 also mixed two classes together, which is thematically somewhat strange, like a Ritualist/Elementalist, or Monk/Warrior. There were a lot of skills for each class, but you could only equip 8(?) with one of them being an elite skill...
On the other side of that, WoW ended up patching out their build diversity. What little they had, the kind of did away with after cataclysm when they simplified the crap out of the talent system which kind of turned it into a gear BiS race ... meh
I vastly prefer diverse choices in talents and builds... it gives me a lot to explore.
Also, I should note that dev attention after release sort of adds spiciness to a game. Reworking and nerf/buffing changes the meta a lot.