Oh, I could fill up pages with lines clients have given me.
Some recent ones:
Client: Could you use a different font for every name, you know make it cool.
Me: Uh, that's probably not going to look so good, it'll be all cluttered and ugly
Client: No, it'll look cool, so let's do it.
after doing what they want...
Client: Now it looks all cluttered.
In a print job:
Client: So are we ready to go to print tomorrow?
Me: Sure if I run film tonight.
Client: OK, then let me call my assistant so we can edit all the text. (which they provided me) I also want to change some pictures and where things are laid out.
Me: Shouldn't we have already done all this days ago? We're not going to be able to go to print if you still are making changes.
Client: Why not?