I checked 'I like all of them' but these days I spend 10x more time on ring games vs. the others. A close second choice was 'who cares' because that's pretty much how I feel about the rest of you folk's choices.
Ring games. I love to play right with my money, so I don't have to sit for several hours straight in order to receive (in my case, at the micros) much less on a good run than I would if I had that same good run in Cash.
Besides, since I'm usually playing for a goal (ie. Win $20 by the next 2 hours) it's much easier to follow through it by sitting in some cash tables than it is by playing a tournament.