What OS do you use?

[Dracindo]

When you buy a computer, laptop or build your own, what operating system do you look to use then? And what's the reason for using this OS?

For me, it's Windows. Doesn't mean I dislike the others, but I'm a sticker for habits. I've been using Windows since my youth, and I hardly worked with any other OS. I just hate swapping over to completely new things, even though I have to sometimes. So I hope Windows will remain for the rest of my life, which I'm sure will.