I'd like to share with you what Ubuntu Linux can look like with some tweaking. This shows that Linux doesn't have to look so boring as many people assume.
Pretty sweet way of switching between desktops is with CompizFusion
As you can see my desktop looks much better than most default configurations. Many will argue over Gnome vs KDE but I personally prefer Gnome over KDE. It just seems to run more smoothly for me and feels a lot more intuitive. For those interested, here's what a default install of Ubuntu typically looks like: