The art of making the uninteresting unreadable.
In short, universally terrible.
One the one hand, you have the limp wristed 'designers', obbsessed with fuschia and sparkly bits, on the other you have the caffiene fueled coders. A match made in hell if there ever was one.
Each has his own priorities. The designer wants to make a bold statement, utilizing the site design to send a sublimnal message of awesomeness to any viewer. The coder wants to get paid and go for a beer.