Treadmills suck of course, if you are on treadmill, you could more easily and cheaply just go outside to walk/jog/run and get some fresh air while you're at it.

But I disagree on "lifting weights". I suppose that most people don't see it as a sport, which "lifting weights" isn't, granted. But things like powerlifting, olympic weightlifting, strongman competitions are sports, which require coordination, skills and progress to become better at them. And they can be very satisfying since they are so easily measurable. I still remember the first time I dead-lifted twice my body-weight. Feels good man.