Hi,
1. - Internet & mail, programming, office (wherever possible): AmigaOS 3.9 BB2
- Gaming, office (wherever I have no adequate Amiga program): Windoof 98 (it's quite safer than XP and doesn't requires such a hardware overkill)
- Firewall & router, mail/print/file/time - server: Debian Linux (486DX2/66 :-D)
2. I try to use the OS that is best for my needs, I'm very familiar with AmigaOS, it is small, very fast, and safe
3. AmigaOS 4.0, when it will be released for CyberstormPPC or if I have the money to buy a micro-ATX AmigaOne.
Noster