Carry on only, since Northwest lost my bag out in a middle of a thunderstorm. Flying out of my little outstation, we have many delays and misconnects. By traveling only carryon, it's easier to be protected on another flight, or same day change/ standby on a later flight.
Have gone on ski trips to New Zealand and Europe this way. It's like backpacking; one learns what's important and what's not. I'm not too worried if I forget to pack anything, you can always find a substitute at your destination.
I love my Redoxx Skytrain.