One thing I really like about the Mac is that everything can be accessible from the desktop with a double click
This isn't particularly unique to Macs.
However, I find cluttered desktops almost impossible to use, and I notice that most people who have them find things slower than with a logical hierarchical system.
Jeff Spirer
Photos: http://www.spirer.com
One People: http://www.onepeople.com/
Surfaces and Marks: http://www.withoutgrass.com