One of the things I used to dislike most about the Mac was the way that applications stuck around even when you'd closed all their windows. “How annoying” I'd think, as I searched through the Application Switcher to find all the programs I'd started that were still taking up precious resources because I'd never explicitly quit them.

Today, I closed the Evolution window on my Linux box at work. “How annoying”, I thought, as the application cheerily told me it was quitting. “I never asked it to do that!”

I guess that's a pretty strong sign that while I still use three different operating systems regularly, my brain has switched.