I'm much happier since I've stopped lifting. I did Starting Strength until I could squat 1.5x my body weight, but I never enjoyed going to the gym, and realized I didn't really care much for the muscle I put on. If anything, it was annoying having such big thighs. I haven't been to the gym for a couple of years now and couldn't be happier. I do quite a bit of cardio (competitive table tennis), and that's it.
How can you enjoy something you're not conscious of? What you likely enjoy is the 5-30 minutes as you're falling asleep, and the 5-60 minutes as you're waking up.
If we could get the actual sleeping time to 1 minute, but keep the rest the same, surely that would be strictly better in terms of human utility.