Operating System

Hello, /prog/. If you had the perfect operating system for writing games in, what features would it have, and what features would it lack? What qualities does the perfect operating system have, and what qualities make you want to stab the people who programmed the OS?

what libraries do you wish came with EVERY distro, or were a part of the kernel itself?
* a BSD-licensed replacement for GMP
* Plan 9's graphics, but with hardware acceleration
* OpenGL