Last year I had a client who wanted just the banner for a website. It had to be spring-like, fresh and incorporate a dozen pictures ranging from 1920s photos to architectural schematics and embroidery. It went through 14 revisions (the first was really stylish - I don't put forward crap!) and it slowly turned into a turgid, drab animation which didn't fit with the rest of the page in any way. The client was finally delighted and paid my tiny original estimate, refusing to pay for the countless hours I'd put in on all the changes.
Fifteen months later, the banner has still not been implemented!