Office 2000 was good one, first Microsoft Office I ever used. I tend to use Office 97 for Windows 9x/NT4/2k. I have Office 97 installed in addition to LibreOffice and Office 2016 on Windows 10 and it works. For Windows 3.1 I use Office 4.3. I use Office 98 for OS 9, but I might give 2001 a try someday. Office 2004 is pretty good. I prefer the pre-ribbon versions of Office. I hated using Office 2007. I'm more used to the ribbon interface nowadays, but I still don't like it. That's why I don't have Office 2008 installed. I have OpenXMLConverter installed too.