Hi Sean, I was part of SWTOR closed beta. I really enjoyed playing this game. As soon as you start playing, you feel you are part of something big, you feel you have you role in this world and the story line is great and interesting. The cons: combats are like in any MMO, even though characters and classes are interesting, it's boring to have to kill 10 monsters to validate a quest.
Then, I read a lot about Guild Wars 2, I've seen a lot of videos, and I would say that so far, this is something that's never been experienced so far. The story is amazing and you feel you are a hero in their world. Regarding the combats, you can move while you cast, you can dodge, your attacks correspond to the weapons you have in hands and your class, you don't need to create groups or parties to be part of a massive fight, you don't need to talk to bots to get quests, they just happen around you and you are rewarded if you participate to it. Plus, there is no monthly fees.
Even if I enjoyed SWTOR a lot more than any MMO so far, I'm sure Guild Wars 2 will be Epic. :-)