1. Ubuntu 11.04
1.1. Pros:
1.1.1. Gnome desktop has been replaced by the Unity interface
1.1.2. The Ubuntu button at the top-left of the screen opens a searchable index of files and applications
1.2. Cons:
1.2.1. the Launcher now hides when you set an application to full-screen mode
1.2.2. e background remains a miserable grey even if you select a brightly coloured desktop theme.
1.3. http://bit.ly/flNMKJ
2. Windows 7
2.1. Pros:
2.1.1. Less Intrusive Security will definatley help you out if you are using Windows 7 if personal
2.1.2. Better Searching is a plus on Windows 7 unlike other programs Windows 7 actually finds what you are looking for the first time
2.2. Cons:
2.2.1. Active vs. Inactive Windowsreport not being able to tell the difference between active and inactive windows that are on top of one another
2.2.2. No Quick Launch Toolbar meaning that all of them have a pin up toolbar to avoid using the start button although windows 7 does allow pin up but just in a different way.
3. Mac OS X
3.1. Pros:
3.1.1. Great programs for the artistic minded
3.1.2. Programs are not married to one another
3.2. Cons:
3.2.1. Speed wise it can be slower
3.2.1.1. not all games can only be downloaded so not all of them