I don't worry about the general public's consensus or what any rules are, I simply make the picture that I like. Sometimes a chopped head works and sometimes it doesn't. If it works I'll go with it if not then so be it. If I'm shooting for a paying client I'll shoot both just so I have them. After all the client may not like what you or I like and they have to be happy at the end of the day. If it is personal work then it's what I like.