I hate exercising. It's not because I am lazy, it's because I get easily bored with repetitive activities. I wish I was good at sports (like basketball or football) but I have a phobia for flying balls (I REALLY get scared of balls) so I guess that's not an option. Besides, my coordination skills are really, really bad.
I walk a lot but I don't consider it exercising, just commuting from place to place (no cars in my life, only public transport).
I have recently started swimming in the small pool we have at home (shared with other families). I have decided that if I am able to stick to it, I will join a gym in September/October, because I do think it would be a great sport for me (light on the body joints, good for the back, relaxing and not timed). For some reason I get anxious over chronometers, so I prefer to decide how many times I will swim from one side to the other than timing myself. And I don't get bored! I am also learning to swim well in the process, and so far I am progressing (even if slowly).