Linux
A very stable operating system for people who want to run a server also fine for the average user. Is harder to use than windows but its worth it. Yes linux is behind when it comes to games, software and drivers. That is due to people not knowing what Linux is, also due to the fact that linux is free therefore the company does not make much money and due to lack of software developers. Simply imagine this, a operating system that doesnt crash and that preforms very well. If we piad for our Linux distrobutions and more software developer made programs, games and drivers for linux then we would acheive this. Alot of windows power users or complete morons have choosen to "bash" linux, please do not believe them, you have to be a moron to believe such crap. 
Windows is a decent operating system with alot of software and alot of drivers for hardware but LINUX is more stable and preforms better and costs much less.