Play on one table is better. But on other size if you play against other players who play several tables, it becomes sooo long, I had such experience.too much time spend in game, then you must change table or start play as others on more tables, but same as you. For me too if I start play on several tables it becomes pure automatic. Call or fold. If have anything go further, if no, then fold, no joy from. The game. So usually better play one table, but sometimes, just to make some practice you can play 2. I even tried 3 tables, but it become pure mess. In time you start confusing yourself. What?who?where? But it take som fun too!