At the moment i dont play more then 2 tables same time. But i think i mentioned this before in this forum it really depends on my mood. If i want earn money then minimum 4 and if just for fun then never more then 2.
Previously, I played up to 8 tables at the same time, such a number was convenient for me, I could be in time everywhere and assess the situation. Now I have not played for a long time, because of this I would not play more than four tables now.
It depends on the amount of my account. Normally i have not so much money on my account. Only if i win some cash in the wonderful cardschat freerolls. Then i play more than one table. In the evening i play more table. In germany actual we coud play a maximum of 4 tables. So it is limited.
Fm 1 to 5, now... The more tables u like to play, the more technical screen apparatus u'v got to have. I do not support more than 5, my multiple screens limitations.