1. MS DOS
2. Windows 3.11
3. Windows 95
4. Windows 98 SE
5. Windows Me
6. Windows 2000
7. Windows XP
8. Windows Vista
9. Ubuntu 8.04
10. Ubuntu 8.10
11. Mac OSX
ubuntu, damn small Linux, win 95, win 98, win me, win 2000, win xp, win vista, win 7, apple os 9, apple os x, apple os 8, windows server 2003, win server 2008, Mandriva Linux,
Windows:
Dos 3.1
win 95
win 98, WinME
win Server 2000, 2003, 2008 enterprise n standard
win xp pro, home,
vista business, N, enterprise
MacOs x leapord
windows 7 ultimate beta
Linux: (way back)
Windows 95-98
Windows ME
Windows 2000
Windows XP
Windows Vista
Windows 7 RC
Ubuntu
A lot of Linux distributions
Solaris
Mac OSX
Erm, what is the commodore 64 OS again?
Windows 3.X (don't remember the exact version, maybe 3.11) (Not the worst)
Windows 95 (BAD)
Windows 98 SE (HORRIBLE)
Windows ME (REALLY, REALLY, REALLY, REALLY HORRIBLE)
Windows 2000 (Still my favourite of the Windows series)
Windows Server 2000 (GREAT!!!)
Windows XP (first edition, SP1, SP2, SP3) (not bad since SP2)
Windows Server 2003 (one of my favourite of the Windows series)
Windows Vista (first edition, SP1, SP2) (first edition was crap, SP1 was usable, SP2 is nice)
Windows Server 2008
Windows 7 (Pre-releases) (one of my favourite of the Windows series).
Linux:
Ubuntu 5.10 - 9.04 all versions (best linux distro yet)
Ubuntu server 32-bit 7.04; 7.10; 8.04; 8.10. (not the best server distro)
Xubuntu 7.10
Eee(xu)buntu 7.10
Kubuntu 9.04; 5.10; 6.06(or was it 6.10?) (9.04 was okay, older versions crap)
Fedora Core 4 (not bad, not good either)
Fedora 5, 8-11 (10-11 was great, before okay)
Suse 10 pre-release (don't know what the hell that OS was, didn't work well)
OpenSuse 11 (brilliant)
Debian's many different versions. On server. 3.X and 4.0 (great for server)
Linux Mint. (nice, but not the best)
Eee OS. (on a 701 4G surf)
Knoppix
Puppy Linux
Mac:
Mac OS X 10.1(PPC); 10.2(PPC); 10.4(Intel + PPC); 10.5(Intel); 10.6 pre-release (Intel) (up to 10.1-10.2 was bad, 10.4 was good on Intel, bad on PPC, 10.5 is BRILLIANT, 10.6 was okay, a bit better, yet buggier than 10.5, didn't use for that long)
Mac OS 7-9 (PPC) (horrible, just horrible)
BSD:
FreeBSD (never used for long, can't grade it)