I like Day Light Savings time, because it means (for awhile, at least) that it is darker in the morning when I wake up. This helps my body sleep in a bit if I stay up too late and need some extra sleep. I still need the discipline to get to bed at a regular time, though. If I were making the decision, I'd keep the US on DST the whole year :)
My wakeup HR this morning was 50, indicating I've overcome my sleep deficit from last week and that my body is adjusting to my 12 miles yesterday (I had a good 7 1/2 hours sleep last night, 7 the night before, and almost 7 the night before that). It's amazing how energetic I feel when I've had proper sleep.