Changing the name is not good; Because some friends don't comment, many people will ask who you are; It doesn't matter if you know all your friends, or not many; You can change your avatar; This won't affect anything, but it depends on whether you are a member or a grandson. Your avatar can also show your personality, so it doesn't matter if you change it often. Personally, I feel very good, because I can let others know your mood and your situation just like keeping a diary.