Not to start any flaming conversations, but I kind of find my own views on Windows back in this nicely written article on Windows from ‘nix viewpoint . It’s not entirely objective of course, and it does not cover everything – such an article probably cannot exist – but unless you are a troll (1) you’ll manage to read between the lines and get the most important points.

PS. Don’t read the comments, this is OSNews, not Slashdot.
(1) Move along, nothing to see here.