6 is more profitable than 10 handed. Especially at microstakes, ten handed, people fold alot of hands that truly are muck and then **** themselves when they see QJ. You get limpers everywhere and no real aggressive action just sort of trying to have the best hand everytime.
Deepstack 6 handed NL is most profitable for me. I like to be able to make good calls but still small ball when im betting. Also I dont want to be stacked easy and people give more respect when you have more chips, obviously because you're a bigger threat.
When I started microstakes I played a 20bb short stack strategy 10 handed and now from playing alot and tinkering around, I have completely swayed to the opposing format.