Fast, Easily networkable, developer friendly, easy.
Not very secure, lots of backdoors, no photo-editing, or word-editing program of decent quality.
Windows 7 has many improvements. Improved taskbar, there are jump lists, it is much faster than the former Windows programs, can make quick launch icons.
Not device specific, very inexpensive, the source code is included, bugs are fixed quickly, more stable than other operating systems, multi-user and multi-task friendly, help is easy to find.
Some programs won't run on Linux, not as popular as Windows, may be difficult to install, learn and use,
My phone is the LG enV2 with the LG proprietary operating system.
My next phone will either be the LG enV3 or the LG enV Touch. They both use the LG proprietary operating system.
iPhone operating system, Google Android operating system, Blackberry operating system,
Bugs and vulnerabilities are fixed quickly, crashes and lockups are less frequent, programs are easy to use, can still run Windows on Mac.
More commercially written software for Windows, complicated setup, some programs have a lot of bugs, the camera is somewhat slow when starting up.