Haven't played WoW in months because I switched to GW2. Had tons of fun leveling and doing world events and bosses. It seems there's always something new to do. I cancelled my sub to WoW because I was tired of hitting my head against SoO HC and didn't feel like grinding reps or whatever. I do miss it sometimes. I would love to take a ride around Storm Peaks or Icecrown, I'll have to console myself with the OST.
As for Wildstar, I've been told it's a rather good game, but I haven't played it myself so I'm not sure if it's just hype or what.