I play every MMO and by that I mean WoW, RIFt, SWTOR, and when it comes out GW2. I have a Warrior in RIFT (finally getting some love since the nerf so many patches ago) and I play a Sentinel and Shadow here. Rift has steadily been getting better, but people will always complain. Their Soul system was like the best thing ever, but thats where the balance issues arise from. so many trees and combos its impossible to account for everything.
But this game is getting better, but still has alot of kinks to work out like RIFT did, and it will get better as well. But I don't choose one game. I play them all