Ubuntu(The fact it's fully customizable. If you like the look of Mac, you can make your Ubuntu look like Mac etc.)
Ubuntu(Well, you can destroy the whole OS with a couple of clicks but it's all your fault)
Win7(That's so obvious...)
1. Windows 7 (most familiarized system from these three...)
2. Ubuntu (most of us do think so , right ?)
3. Windows 7 (i have no idea what i'm playing...)
Ui Linux, it can be whatever you want it to be.
Programming depends on what you are programming.... If you are coding windows games......
Gaming, windows.... But steam is coming to Linux.....