Me? Price rarely is part of the decision on travel. Most of my trips are short notice so, I'm usually paying full fare.
What is important for me is getting to/from where I need to go. With more and more cutbacks on service, and United trying to force me to connect, DTW is starting to be a reasonable alternative. I would rather drive an extra couple of hours at each end of a trip than putting up with connections... especially during weather related irregular opps...