Aqua looks nicer than any windows manager has to offer. I run Ubuntu for my work desktop, and Debian for servers, but at home I have a macbook and a mac mini running 10.5. Before that I had a powerbook for 4 years. They are all awesome machines. I didn't have to spend time tweaking config settings to try to get the sound card working, or deal with updating and breaking everything. On OS X I've never had to fix something after an update, and sound always works. I'm not dissing any linux distros, but they are truly for hackers that want to spend time tweaking on things getting them to work and dealing with problems. OS X allows me to get more work done because I'm not dealing with those hassles yet I still have vim/emacs/whatever other unix app I want to install. The only complaint I have is that the packaging doesn't seem to be as good as Debian/FreeBSD/Gentoo. Maybe this has changed in the last couple years, but Macports and fink never really worked out all that well for me.