I use AmigaOS3.9 occasionally on my A4000T.
I use AmigaOS3.9 quite regularly via WinUAE on my netbook when I'm not at home. (Hopefully next year I can replace it with a AmigaOS4 netbook:))
I use AmigaOS4.1 quite regularly on my Sam460ex when I am at home.
I, unfortunately, use Windows XP when I'm at work.
Also, I have Windows 7 running on the family PCs in my house (the PCs that the wife and kids use).
