I never really got the point in downloading complete UIs...
My UIs are highly personal, because they are built to fit my very own needs...
I really think, style is important, but as a tank, everything have to be "in place" to make sure, I'm not overlooking anything.
But there should be some "eye-candy" aswell, as I have to look at the UI for some time^^.
So yeah, form follows function, but please, style it as far as possible!