This is generally true not only with thigh lifts, but all procedures. It is most often better to go with a plastic surgeon who specializes in the area you desire to modify. However most surgeons perform more than one procedure, therefore your goal should be to find one which specializes in a certain category. For example- thigh lift, tummy tuck and liposuction. You do not want a plastic surgeon that claims to be an expert at noses and legs or two other unrelated parts. I find those those whom are skilled at facial operations are not qualified in my opinion to perform plastic surgery on the body and vice-versa.
One popular new plastic surgery technique is called lip grafting, or "fat recycling" wherein fat cells are removed from one part of your body that is too large, such as your buttocks, and injected into your lips; people will then be literally kissing ass.