Do you want a classical game or a modern game?
If former->go to Rift. I recommend it wholeheartedly(it really is THE BEST Themepark out there).
If latter->stay here. This game is designed more for crossover audience(Sandparks and Themeboxes).
Also Sandbox or Themepark?
If classical sandbox->go to EvE. Really awesome game!
If modern hybrid sandbox->stay here!
Hope this helps
Edit: Also stop thinking/planning and get to playing dam it! That helped me and now I am enjoying GW 2 immensely(just look at my posts from a week ago O.O)