I didn't like myself for many years and I would have wanted to change. However, once I reached about 40 I realised I was happy with myself. Now I wouldn't change myself at all. I'm 48 and when I look back at my life I've had a hell of a time.
I had a terrible time as a child. I lived abroad until I was 12 but came back for a month or several at a time depending on my father's airline postings. In the UK I had an evil headmaster who did various things over 4 years. I never fitted in at school here after 12 and cracked totally when I was 15 not speaking to anyone. I've spent most of my life like that. I went into business when I was 24 and I paid my mortgage off when I was 29. I've always had periods in life where I mentally collapse and shut down and I come to hours, days, weeks or months later. The business and my first wife fitted around the periods I 'wasn't available'.
I met my second wife and life is now so good, despite her having an accident and now needing 24 hour care from me. I still shut down for periods then we both get care. We still travel which I have always done and I've always been to more separate countries than my age. I lost most of my hair by the time I was 40 and I smoked from the age of 9 until my 40th birthday. I've never worried about being attractive to other women and I'm happy about my weight being rooted at 18 stone which is 3 stone over the ideal weight for my height.
I did have a career - a wild one from one crisis to another! However, if I was told today I've got a month to live I would look back and think I'd had a hell of a ride. If I had my time again I wouldn't change a thing!