I used to play 4 tables and then try to keep them all the same variant and 9 or 10 player. If I mix no limit hold em and omaha hi/lo, then I do not feel as comfortable as all the same variant.
My computer broke about 6 months ago, so I have been playing on my phone, so now I have been playing one table. It is nice using a phone instead of a computer, however my poker time has gone down dramatically since I found a game called Kings Of Avalon.