What do you hate using but are forced to use?
jacquesm: Linux. It's arguably one of the best unix clones ever and it is extremely stable. Still, I feel that another clone of macro kernel unix was a missed opportunity. Plan 9 and it's ilk (and QnX) seem much more the direction to go in for many reasons, most of them having to do with modularization, upgrading your operating system (even the kernel) without rebooting and user land device drivers.Still, to make a living plan 9 and QnX are niches, plan 9 is very much an experimental os, and QnX is mostly relegated to being a real-time embedded systems os. If you've worked with either one of them for any length of time though you really will begin to appreciate that there are other possibilities that are worth researching.Linus and Andrew Tanenbaum had this out a long time ago, and it seems that Linux 'won' by acclamation but I'm not so sure that wasn't simply pigheadedness instead of sound engineering reasons.