A lot of my friends always ask me "what can you actually do with Linux?", as if they still expect it to be an ugly, command-line based system.
Although I have swapped the Galaxy theme for Plastik and the Nuvola icons, I believe I have a fresh-looking desktop :) . When freinds come over, we play Unreal Tournament 2004 over the LAN, browse the web, chat in IRC and MSN, check email... what more do they want me to be able to do with Linux? :)
Here you can see me running my web server in FireFox, listening to (cheesy 1980's pop) music in JuK and looking at my MSN contact list.
You can also clearly see my "dock" down the right hand side of the screen which all my friends love.
Mandrake 10.1 / KDE3.2 / Nuvola icons