Played one season of high school tennis. I was pretty good, but not great, but my high school team was -- it won the state championship every year I was in high school (and at least one more year consecutively), so I was assigned something like the #6 doubles team. That doesn't get you invited to tournaments, or even to travel with the team because only one other school we played had that many doubles teams, so I only played one match the entire season. That wasn't enough to keep me coming back (and, as the consecutive state titles proved, I wasn't going to be moving up the depth chart).
Started playing recreational hockey when I was 14, so I was way behind people who had played since they were little, and we didn't have the funds or time for me to join a travelling squad, even if I was good enough (I was a pretty good goalie by the time I was 16 or 17).
I'm basically a pretty good recreational athlete: not big enough, strong enough, or coordinated enough to be anything special in any sport, but I have decent size and play with a lot of effort and a little coordination. In the adult world, I'm generally one of the better athletes at every sport I play, but never one of the best. I wish I could have sports seasons like my kids play in, where I could play soccer in the fall, basketball in the winter, baseball (or softball) in the spring, tennis in the summer, and hockey year round, but that's not the way life seems to work out.
Funny, about the only sport I'm not interested in is cyling (as in racing). I love to ride my bike and put a lot of miles on it, but I can't imagine wanting to join a bunch of amateurs in a peloton. That sounds insane.