Yup. To me, IRIX was the best, until I found GNU+Linux in late 2003 and becoming a windows refugee, not to IRIX, but to, not just GNU+Linux, but all freedom respecting operating systems and their distributions, and the potential of what they could become, as I and many others attempt to learn them, and help contribute to them. Many more itches to scratch yet. The best is yet to come, for each and all. :) Or so the philosophy inspires and aspires.

[PS... Oh I so would love a FOSS IRIX... a free software ["open source"] multi-arch IRIX revival though... beyond just NekoWare and whatever else is scattered around.]

[PPS, oh, and varies computer to computer too... I don't use the same distro everywhere. Sometimes even several distros on the same computer. Quite right to point out the folly of the notion of there being a one-true-way "best".]