I love Linux, there is no two ways about it. One compares ones servers by the amount of time that they are up. We currently have Novell Netware, Linux and Microsoft Windows Servers.
Comparing uptime of our servers, i noticed that the best uptime we have are on our linux Servers. Next comes our Novell Netware Servers and then finally the Microsoft Windows Servers.
Current stats are: Linux 43 Days, Novell Netware 28 Days, and Windows 6 days.
Before I used to have uptime in excess of 180 days on my linux box, and am aiming for that now as well.