@heyjoe415
I would slightly alter your guidance to 40s and 50s and add what I consider the most important criteria (and why I am increasing the age range): extensive experience doing the same procedure I am wanting. I would want at least 100 praocedures and preferably hundreds or thousands.

Someone has to be the trainee. I don't want it to be me. I was in the supermarket recently and bumped into a woman who enthusiastically told me she had recently had a hip replacement by a surgeon who had been trained by the inventor of the method. I asked if she meant Jimmy Chow and she said yes. I then told her that Jimmy Chow was my surgeon. My point is that the guy who was trained I am sure is a good surgeon and Dr. Chow runs a fellowship program but I prefer the trainer, not the trainee.

There are newer approaches to hip replacement: Superpath, STAR, etc. instead of anterior or posterior. I had Superpath by the primary inventor of that method (Jimmy Chow) and I had zero post surgery pain. I attribute more to his skill than luck because seven weeks ago he replaced my right knee and I had zero pain after the surgery as well.

I believe the single most important decision one can make is surgeon selection. I have a bunch of criteria for that but once you have selected the surgeon, I believe in following his instructions and advice.