I had epicanthoplasty, eye shape correction, and buried-suture double eyelid surgery. Among cosmetic surgeries, double eyelid surgery doesn't tend to have major side effects, and because it can change your image quite noticeably, it feels like the only surgery I wouldn't discourage people around me from getting if they said they wanted it.
Since the eyes make up a large part of one's impression, I'm also living very satisfied with it!