Do people's live's really change

If you inherit a lot of money, win the lottery, see an angel, or get rich quick really quick, is it really going to change your happiness level? Aren't you going to be basically the same person as you were before? It seems almost impossible to believe. Especially if you are basically a good person or basically a very bad person then I don't think it will really change you very much. It might provide a small window for change but any common event could provide that possibility for change. thoughts?......