Okay, I just read through this thread, and there was not one word about Windows 2000. As both a user and tech, it was hands down the best OS Microsoft ever made. They took all the lessons they learned about stability with NT 4.0 release 6a and combined them with the video and compatibility stuff learned with 98 release C (DirectX) and made a stable, high performance OS that almost never bluescreened(except USB issues prior to SP1) I miss Win2k.
Most FReepers would have never used it, since it was NT (for server use).