I play six max simply because i find the tight (near camper) style too difficult to play all that well on a 10person table. 6 max gives you oppertunity to play more cards in more positions and also a lot more flops are available to steal with not so good cards.
The only possible downside is that you dont win many big multi way pots unless obvious draws are on the table. Therefore you have to consistently play decent poker with few if no mistakes to make this type of table pay well imo.