long story short:
w1-3: LOL... pelease...
w95 ? nah.. I stuck with OS 2.1 and later 3.0 on my A2000 + Mac OS 7.5
w98 ? skipped it, OS 3.0 at home, Win NT (3.51 with shell 4.0) and then 4.0 at work
wME ? never even seen it
w2000: YAP, by then my A2000 was retired
wXP: good job; and Linux (suse 6/7) was not up to it yet :/
wVista: hahahha... ahum
w7: where I am now... with Solaris (oh yes, GREAT server OS), SUSE 11, Centos 5, Ubuntu... as very useful although I run them mostly in VM as I'm mainly using them as server/test OS's
Work-wise I will likely take an increased interest in Red Hat (server side)
Tom UK