I see GW2 is one many people are looking to, but id didnt find the first one that exciting.
GW2 is quite different from the first game though. It's now a persistent world like we see in other MMOs, but it's one that players can affect, and your efforts will have a direct effect on how the world looks and plays. The game is also extremely focused on cooperative play, not to mention breaking the old mantra of -tank-healer-DPS (there's no dedicated healing class for example).
It looks like it will bring some much needed refreshments to the genre.