I had my appendix out a few years ago which had some complications. Probably my biggest surgery though was when I was hit by a car in my twenties. I broke my right femur in two places. In hospital for two weeks and off work for three months. The surgery involved inserting a metal rod into my leg (which is still there) to help the bone heal. It occasionally gets stiff (hehe) in the Winter but overall they did a pretty good job.