I bought a PC recently which had Vista installed on it. After trying it out for a few weeks I gave up. I got rid of it and I installed Windows XP which is much better IMHO.
The machine I am currently using has Windows Vista. I am very seriously considering having it uninstalled and having Windows XP installed on this new machine. I simply found XP much easier to use.
XP Home. followed by Mac Tiger. I've been holding off on getting a new laptop until I can get my hands on a copy of XP....you know, in case Vista really does turn out to be a s bad as some have said.
windows xp or ubuntu or fedora, i have worked in all these & found it out to be smooth, i have worked with vista but apart from looks i dont think it has any other thing