Linux is a great OS. Open source and free. Can work as server or desktop. There are a lot of applications: office suite, internet web browser, email client, image editor, 3D modeler, games, online games, software development tools, etc. Using Linux, I can almost do anything I want just as I am using proprietary OS.
However, there is a drawback. If a computer cannot be used for playing games, then it will not be 100% perfect. Yes, Linux has a lot of free and open source games, but I feel that there is still a gap between free games and the commercial games. Though I may not use Linux to play the latest game, at least it should allow me to play my favourite game.
Luckily there is WINE. Though it cannot 100% compatible to all the games, at least have a try. The following is a screenshot of my most favourite game!