I had a client who wanted me to illustrate multiple characters for a game. First they asked me to illustrate one character to see what style I would do it in. I sent it to them. They changed their mind and asked for a different style. I redid it and sent it to them. They seemed to like this better and asked me to continue with the next two characters. After sending those in, they changed their mind again. After the third revision, they sent me a email telling me they wanted me to redraw every character created thus far.
Client: The one you submitted to us.