I've wanted to write this article for a long time, but of course didn't want to offend any previous client. Now, thanks to The Bad Pitch Blog, I don't need to. A big thank you to Richard Laermer for listing the ten reasons:

10 - You don't trust them as far as you can throw them!
9 - Everything they demand is in direct contrast to what you know to be right.
8 - Client company is on its way down.
7 - You keep sitting in on meetings with them that are at once pointless and breathless.
6 - You get the creeps when an email from this client crosses your in-box.

5 - You dread their responses to your questions because you know, once again, they aren’t paying attention to you but instead, are following their own agenda.
4 - Getting their bill paid is tougher than the toffee at carnivals.
3 - The client keeps making you think about going into a new profession.

2 - You daydream about working with their competitor(s).

1 - The person paying you is sure that everything they do is fantastic, despite having no notion of what fantastic is. And no vision whatsoever.

Read the full article here.

And if you have more to add, we'd love to hear about them.