I don't think I've ever done a pure MR. I usually like to spend a few days on the ground wherever I go. I generally won't bite over 5cpm unless it's a place I really want to go. 3 or under (and it's a time I can go and a place I'm interested in) and I'm going to try very hard to make it happen.
I prefer international destinations (I've seen much of the continental US already, just not as interesting to me), which means I fly a lot of coach. I'm to the point now where I don't mind it very much (although my one successful op-up NRT->DTW was a very welcome one coming off of a 7 hour SIN transfer).