I have to say GW2 has the best UI hands down of any MMO I've played . It's able to convey everything it needs to without taking up so much damn space on the screen, even though that partially thanks to the 10 skill limit. I had four full bars of skills in ToR, I don't miss that at all.
Edit: Just some general thoughts on the weekend. I was very conflicted between Mesmer, Thief, and Guardian as my main going into the weekend. Played a ton of Guardian up to level 23, mainly rolling with Mace/Shield and Greatsword, really enjoyed that combo. Shield skills need a bit of work and so do the Courage and Resolve Virtues, but besides that I had a great time completing DEs, going through my personal story, and supporting my teammates in WvW, even if we're lacking a proper ranged weapon.
Mesmer I was super excited to try out, but sadly I never quite got a handle on, which may have been my own fault but I just wasn't feeling that class, I may give it another go next BWE. I love the idea of the Mesmer I just think it could use a tiny bit of work, especially with Illusions/Clones/Phantasms. Thief on the other hand I enjoyed immensely, it seemed to be the most complete in mechanics and skills of the three classes. Played a bit more sPvP with that class than I had planned.
All and all I had a fantastic weekend, and I'm already craving another BWE.