Geez.
Nobody expects you to actually use the default look and feel! It's a generic most-likely-to-be-corporate-friendly.
Bluecurve?? Blueblah.
For fonts you can use any truetype font. These are the most common....
To add fonts you can copy the ttf files to a directory in your home directory called ~/.fonts
if it doesn't exist make it, and copy your fonts to it. For system wide use of fonts put them into /usr/share/fonts
Then they should be used automaticly. Check out the
http://www.dustismo.com/ fonts. Some of them are nice.
If your using Gnome check out gdesklets. for little eye candy do-dads.
For borders, icons, and widgits check out
http://art.gnome.org/ for Gnome stuff.
For KDE they have their own setups.
however if you want to have realy nice stuff to look at your going to have to get away from Gnome and KDE a bit.
I installed and played around with the new Enlightenment DR17 enviroment. It's in alpha stage, and is not that usable and has to be compiled from CVS. But it's neat to look at. The little borders shimmer and it has a dock that is fancy looking and it's all OpenGL.
To get a good idea of what is possible check out these
movies
The sky is the limit for what you can do. You can make it look like
Windows, you can make it look like
OSX
you same window mananger, afterstep. Just different setup.
Everybody is different and your desktop is designed specificly for your needs, wants.
this is the from Gentoo developers. Each one is like a fingerprint.
Even minimalist Window managers like
here are a bunch of screenshots have almost unlimited variations.
You don't want to give up the convienence of a modern desktop, but you want something fast?
fluxbox it's XFCE.
Then again there is minimal, and then there is [L=MINIMALIST]http://www.nongnu.org/ratpoison/shot2.png">here you go</a>.
that's ratpoison. No titlebar, no menubar, no nothing, no anything. HELL its is a Window Manager that doesn't even have WINDOWS! It's ratpoison.
A person could spend a month easy just screwing around with the GUI.