I agree with some comments above. Playing more hands gets you ore experience, lessens the likelihood of playing too loose, and you're more likely to grind out a win if you're a winning player. Multiple tables allows you to hedge your bets and ride out the variance more quickly on a losing streak. However, you can overcommit yourself and start playing poorly so you need to learn what your limit is. I prefer being able to concentrate on 2-3 tables maximum, any more and I start to lose my edge.