In our studio, when someone spoke of the client as 'barking', they didn't mean mad – they meant 'you don't buy a dog and do your own barking'. But then we found Tom Fishburne's classic '8 types of bad creative critics'. He's identified the full set of favourite client types. We have met every one of these clients, and could give you their names.
Tom has a brilliant collection of marketing and branding observations at his Brand Camp website. You can buy this cartoon on a mousemat, T shirt or mug at his website.
Note to current clients: none of you are like this. Never.