I try to get into it every now and again but I just find combat too slow. There just aren't enough abilities to use in combat. Of course, the only class I have above level 15 or so is a necromancer (who also has terrible issues regarding pet balance and pet control). I've tried leveling both a rogue (which seem more resource based) and an engineer (still cooldown based but their grenades, for example, cycle quickly) just to experience other classes but the grind gets to me within a level or two and I stop and go do something else.
It's ironic, in a traditional MMO like SWTOR or WoW, in leveling I generally only use about four abilities anyway. But because I'm limited by resources instead of cooldowns, it feels more active (plus I actually do have a variety of non-spammable keys - cooldowns, interrupts, CC, etc). Even in boss fights where managing your resource becomes a kind of "delayed cooldown," I still have a lot more options to choose from than in GW2. As a necromancer, my highest DPS appears to be dual daggers and one, maybe two wells, and if I touch anything else I've chosen poorly. Auto attack should never, ever be a player's best decision for damage, it should only be supplementary. (Commentary void when options exist to benefit from staff's AE effects).
I may have complained about this before, possibly in this very thread, but no one's every bothered to discuss it.