Personally, I've never been really into sports (never liked or could stand competition). As a child, I was healthy and strong, but not very well coordinated, so I was a disaster in all team sports (soccer, voleyball, basketball), and earned a "sissy" reputation, which hurt me a lot. (It was somewhat softened because I was excellent in academics and always helped my classmates with their homework, so, even the worst bully in my class would have a kind of respect for me, and protect me from humiliation). As a teenager, I became very interested in fitness and body-building, and made it into a rowing team (I am not quite sure how this sport is called in English - we used to call it "akademichne vesluvanya," literally "avademic rowing," long narrow boats, a traditional sport at many English and American colleges). But even then and there, I did not enjoy the competitive side of the sport; I loved to train, to grow muscle, to feel capable of a physical effort, but I could not stand the atmosphere of competition, when people scream and yell, and it's all about this last split second that decides between the hero-winner and the rest who are despised and jeered.
As for watching, there is only one sport that I can watch and love to watch, and that is soccer (or what all Eropeans call football). My home city, Kyiv (or "Kiev"), is the home of one of the elite European soccer clubs, Dynamo. In Kyiv, soccer is a cult. It's very un-Christian, perhaps, but it's true.
I absolutely do not understand such American sports as American football and baseball. People tried to explain their rules to me, but I never got them. I have no concept about what's going on, so it's useless for me to watch. I also cannot grasp, how in the world people can watch bowling or poker. (But then, probably, many Americans have a similar question about me watching soccer.)
My wife was never interested in sports, never liked the competitive side of sports - just like myself. Our daughter is like us, too: she is a shining example of fitness to us, incredibly healthy, slim and strong, loves to jog, run, bike, etc., but she never was on any sports team and she despises competition.