Personally, I've been looking forward to GW2 for much longer than Rift (I knew about it but didn't really excite me), and I will clearly be buying GW2. As far as GW2 trying to have a different structure from general MMO's, I'm all for it!
Rift was a surprise for me though, it's pretty good. I love the class system. The rifts are a cool thing, but I think it might get old later on... time will tell.
For a game that just released, its got a pretty good amount of content, although when comparing to WoW for exemple (WoW is a good baseline in MMO's, whatever are your thoughs about it), which got several starting zones, it's a bit restrictive.
I'm playing Defiant, and I think Freemarch is way too big. Past level 14 I was starting to want to see more, and you can't really go quest anywhere else (as far as I know).
Anyway, let's give it time, it's barely a week since the game is out and I can't wait for content updates.
Edited, Mar 10th 2011 2:05pm by Shabla