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?

>>15
tags that refer to data in some sort of knowledge base
I've been looking into this for the longest time (to sort my images, actually). Why has nobody written a good implementation of that yet? It could integreate into an existing filesystem or build on top of it.