I find lots of bad loose players at 6-max. It seems shitty players are drawn to the game with less people, I guess they figure there's less guys to beat them. Sidenote: Try opening up a HU table at lower stakes and see how many crap players sit with you.

Full ring is better if you're more comfortable with steady camping. Players in full ring are easier to plush around. I like 6-max thought because for the most part they're just idiots. Of course I'll be singing a different tune the more I move up in stakes but as far as I'm concerned 6-max is quicker money.