Full handed feels like an endurance contest more than a poker game to me now. The fewer the opponents the better in my book! I only willingly play 9 or 10 handed games if there isn't a seat in the six max or tournament poker.

If for no other reason, I would recommend playing six max to improve your hand reading and recognizing opponent tendency skills.

If I get stale I go to the micro PL Omaha on UB. $2 max buyin. I can go berserk for an hour or two without risking much and then I'm ready to play my A game again.