Fisher Price OS.
My first computer was MS-DOS 5. I had Symantec Norton Commander for file navigation.
When I got windows 3.1 the colour red didn't work. My father took all day to fix it but he was so proud.
I remember windows making fun of the Aqua interface in macs for the same reason, but I liked it then and hate that they've been removing colors from the OS over time. One of the reasons I switched to linux was to be able to easily customize the various icons to make them more visible.
XP actually wasn't great on release, though I don't know anybody who clung to ME, considering it was itself a huge dumpster fire. It wasn't until SP1 hit that XP got really good.
Most of us were just riding out 98SE as long as we could until MS got their shit together. Some people had 2000, but it wasn't really a consumer-class OS; it was meant more for the enterprise.