Hmm, right now for me its:
UAE and UAE for Pocket PC (Pocket Dpaint, I love it)
Windows XP 64-bit Edition (for AMD64) (UAE loves my amd64)
Windows XP 32-bit Edition
Later:
Windows LongHorn 64 bit edition
MorphOS
I have beos on an older box and love it.. I just don't hear much about Zeta or OpenBEOS anymore..
As for XP 64-bit.. I would use it as my main OS (even the preview edition) if there was a good wireless driver. The CPU and OS is faster than anything I have ever used.
