I only play single tables now as I don't really want my Poker to be hard work, Playing multiple tables takes the fun away from the game, It would be like playing Chess with 6 other players at the same time, Been there, done that, not funny!
A teacher I had at Junior school thought it would be a great Idea to show of my chess playing talents as I was the school chess champion for 3 years running, believe me it wasn't fun.
I find I play better when I am feeling relaxed and I can enjoy the game, whether it is Chess or Poker, it really does not matter, the important thing is I can enjoy playing.
If you multi table the fun is taken away from the game and you are already adding pressure to yourself, trying to juggle all the tables, also because you have different tables in different stages of play, this adds to the pressure because you play differently as the tournament progresses, so if you bust out of one game and start another, the blinds are different, the players are different, and you have to try and read the betting styles of each player, it becomes very confusing.
I stick with one game at a time now because I am getting too old to try and make a living from the game, all I want is a relaxing game I can enjoy, and have fun playing.
When the fun Stops, STOP!