Days ago I wrote about using a tango-based desktop. I really like a blue-like desktop, there is a post in ubuntu forums that explains how to change the default usplash image and some other things in desktop to show it as blue-like one. I'm one of those people who don't like default theme and enjoy using blue-based themes, the better of using free software is this that if you don't like it you can always change it.
Don't forget GRUB theme.
BTW. Don't they look nice?.