3D

I've been using Linux for a long time, and I learned to use it by installing it and using it as my primary operating system — as far as I'm concerned, the year of the Linux desktop was in 1994 or so. Since then I've actually bounced around to a variety of operating systems and even single-booted my primary machine into Windows XP by choice, using Cygwin as a crutch. I've been running Linux solidly since Ubuntu Dapper, using Windows only on inferior (and seldom-activated) computers or in virtual machines to close corner cases like my mobile phone. Throughout that time, I have basically never been satisfied with the default appearance of the system.

You may have noticed that just about every game today is done in three dimensions. Even card games have cute little shadow effects. These days, form is seen as just as important as function everywhere; Take a look at a Ram truck sometime.