I will say that I have learned at these events that it's wise in the later stages to save chips for big hands where you feel good about getting it in, because people will have a tough time folding, and you want to give yourself the maximum opportunity in those spots.

So I like the set-mining and the strong preflop hands that will play well in all-in spots, while I really don't want to deal with drawing hands or the QT/KQ/KJ/AT type crap which just end up roping you in to second best, and where one hand outkicked will eat most of your stack

Or, simply put, since you don't get to play many hands to completion, you really want the ones you do play far to be of the variety where you're already in good shape.