Which operating system do you use, and why?

[Game_boy]

I just came up with these reasons in half-an-hour to use Linux (specifically Ubuntu, although it's your choice. Most of these benefits, but not all, apply to Mac OS X and BSD too. I've highlighted some of the more important reasons (in my opinion).

1.It has native 64-bit support that is stable and has more application support
2.It is completely free
3.It is open-source and has no freedom restrictions
4.It has no known successful wild viruses
5.Installation can be done from a temporary storage such as CD so you can try it first
6.It is DRM-free
7.Support is of high quality from the distribution providers and online communities
8.It can read Windows file systems but not vice-versa
9.It can migrate settings from other operating systems but not vice-versa
10.Root access is disabled by default
11.Setup does not require online activation and all of its problems
12.The built-in text editor gedit has programming features
13.Setting it up as dual-boot is much simpler and actively encouraged
14.Wireless networking is much faster to connect
15.It has weekly updates with new features as well as bugfixes
16.It has a six-month major release cycle, not five-year and upgrades only require a few clicks
17.Package managers download and install applications in one very fast from safe sources
18.Internet Explorer is not integrated into any system functions
19.Free office software that functions identically to Microsoft Office is installed by default
20.Free graphics software with as many features as costlier software are installed by default
21.Window compositors such as Beryl look far better than Windows can, with more options
22.CD burning is a much simpler process
23.Easy drive mounting and System Monitor (Task Manager) can be clipped to the top panel
24.The desktop has workspaces which can be switched to give double the desktop space
25.It has menus for Applications, Places and System which are less cluttered than Start
26.It has no need for a registry so you know where application data is installed to
27.It doesn't suffer from 'Windows rot' – gradually slowing down over time
28.The terminal (command line) application is much more complete
29.Wine compatibility layer can run most Windows applications faster than Windows can
30.The system takes up less than 500MB of space versus Windows' 15GB
31.Performance of applications is much better
32.It does not ever require defragmentation so never slows down
33.Bugs are fixed very quickly due to open source code
34.Can install several free and powerful development environments for many languages
35.Native multi-core support that is more stable than Windows
36.Networking is much more powerful as you can have true server and client model
37.It runs on many processor architectures and so works on POWER game consoles too
38.It has no privacy issues
39.If you don't like an aspect of it, you can change each tiny module such as window manager
40.It has openly documented interfaces so anyone can write a window manager or file manager
41.It works with Windows networks but doing the reverse requires slow, expensive software
42.Free virtualisation for all versions (Microsoft disallows Vista virtualisation for non-business)
43.It has fully customizable theme and keybinds
44.It's translated into many more languages than Windows
45.You can use open-source MythTV to do everything multimedia fast including live TV
46.Does not require an anti-spyware or anti-virus software that slows your computer down
47.Programs for it tend to use open standards that do not require expensive programs to open
48.If you need a particular feature you can program it in yourself or pay to have it written
49.It is far more stable than Windows and one part failing does not cause a system crash
50.Force-quitting applications always works first time