i've liked TOR strictly as a co-op version of knights of the old republic that i play with a couple friends. i've played the consular and trooper plots so far, and i admit that's all that keeps me playing. when i've exhausted the storylines that interest me, i'm going to cancel it. i'll confess i never played WoW, but from what i recall seeing when i saw unfortunates subjecting themselves to it, TOR looks like basically the same game with the same mechanics.
i think it'll be good for the genre that the mighty bioware with god's own budget are still going to fail, and it's because of sticking to the staid old formula.