I had to quite WOW because of life a few years back. Honestly, you just need to find a balance. When your more worried about what your missing in the virtual world than in the real world you need to step back and take a break. I play SL, and I'm a casual gamer who plays when life gives me the opportunity. But I don't stress over what's happening in game when I'm not there. Leveling will come - over time - I'm good with that. And my family isn't suffering for my game play.