Windows 1 and 2 sucked.
Windows 3 was better.
Windows 3.1 was even better.
Windows 3.11 with 32-bit drivers was great. It ran circles around all previous 'Windii'.
Windows NT 3.51 was awesome!
Windows 95 was also great. When it hit OSR2 then the goodness really set in.
OS/2 Warp was awesome as well and was primary OS for about 2 years.
Windows NT 4.0 Workstation was my primary OS once it came out. I loved it. It was quick, and stable. Never let me down.
Windows 98 was great, just a much better Win95b. 98SE continued this tradition.
Windows 2000 was the best of both worlds: NT and 98. Not as fast NT 4.0, but it's rich feature set sure made up for that.
XP is just a refresh of 2K IMO.
Vista is XP done right. Minus UAC. That was stupidity.
However:
MacOS is far superior to them all.
Now that it can run on Intel and virtualize other OS's, all I have to say is:
One OS To Rule Them All
One OS To Find Them
One OS To Bring Them All
And in the RDF Bind Them.
OS Really reminds me a lot of NT 4. It's fast, stable, pretty and get's the job done. It doesn't mess around with bad hardware or lower class hardware. It has an attitude, knows it and doesn't care. OS X brings modern memory management and pre-emptive multitasking to the table NT also had these features. To me OS X is the way an OS should be. Just like NT 4.0 was. It got out of the way to let you work.
/me loves NT 4.0