I've used windows at work and/or at home 3.1, 95, 98, Me, 2000, xp, Vista, and own 7 too.
I don't even know what Macintosh or apple I used in the early to mid 80s to learn Adding/Subtraction/Multiplying/Dividing tables, play games, make cards on a dot matrix printer.
I have way more experience with Windows than Mac, and I still prefer Mac. I have used PowerPC Macs, my wife had one of the first iMacs when she was still my girlfriend. The colorful CRT version. I would use CSCC dial up with it to get on the net with it.