Windows 7 64 bit, love it, runs games great, no issues -Desktop
Windows XP 32 bit on laptops, they are running fine, but if one starts to act up, ill probably end up putting some form of unix on it
Had Windows XP 64 bit on the desktop b4 windows 7 was fully released, wow that was horrible, no issues i could definitively pin on the os, but had more issues while running that then any other os
Cant wait for the Chrome notebook to be release though, tahts all i really need for my laptop
avoided Vista like the plague
i would do mac, but if its a gaming grade computer, it needs windows 7 (dx 11 and game compatibility), and if its not, why not just go linux, its free, runs on lower grade hardware, and runs faster