After everything i've read the past few months I think, preferences aside, it boils down to this:

Six max is more profitable for good players. Some of us are not good players, and haven't yet realized it. I think the player skill continuum looks something like this:

- Awful
- Poor
- Mediocre
- Average
- Good
- Very Good
- Excellent
- BK/Schneids, etc.
- Supreme Poker Being

I think it breaks down such that Goods are winners at 1/2-2/4, VGs are winners at 3/6-5/10, Excels at 10/20-20/40, BKeids at 30/60+ (but not all levels), and SPBs at any level.

Once you reach Good, the full ring and 6max games are such that, combined with your talent, there's more profit to be had playing shorthanded.

I play full ring, b/c i'm a mediocre player.