There’s a very funny and applicable list of gripes which will be familiar to most graphic designers at Adland.
My favourites are
15. If three designs are shown to a client, your least favorite will be chosen or any combination of worst components of each.
16. If two designs are shown, a third will be requested. If provided, then one of the first two will be chosen.
And there’s more notes about bad design projects at Andy Budd’s blog.