The point I'm making is that exercise is not fun for me, and while I appreciate the effort, attempts to persuade me otherwise are doomed to failure. (The endless, banal music the gym played didn't help.) What was worse was that there was no objective way to measure progress so I didn't even know if it was doing anything.
(That said, I do enjoy hill walking (== hiking), but that's even more of a time sink and not something I can do on a daily basis. It's also strictly low-output aerobic.)