Length of time it takes to load the loading screen is my problem.
MMOs cater well for a casual gamer. They can pick up and put down.
Spending 5 mins loading a loading screen for 30mins of play seems counter productive.
Spending 2 mins loading a loading screen because you wiped in a dungeon/raid is depressing.
My system let me down. In till I get a better PC, I won't be playing SWTOR.
It's playable with my machine, just the loading screens make me sad and demotivated.
Linear levelling zones doesn't help either with re-playability. Sure class quests make it different, but that's 25% of a quest planet's quests. They also tend to direct you to the same region as well.
Balmorra can burn in hell.
That said, I've quit for GW2, not WoW. WoW is dead to me.