Nice question man, i didnt thought to ask others here about the tables, cause before i was wondering how other players play at 4 tables at a time.
When I start playing on three or more tables at a time, I dont feel that confortable to take those decisions correctly. That harrasses my brain and make me dont think clear. At 2 tables im alot of times more sure about the situations im gonna be in the future. Also its good to observe your opponents plays, write a notes, choose a style to play and also throw a hook and wait to be bitten.