Do you play in full screen or windowed mode?

An odd question I know, and I am most likely in the minority with this, but I play windowed mode only and can't stand full screen, especially not in The Sims. I usually have the game open along with chrome so I can go to youtube during a loading screen. Or when things are getting a bit boring I can just leave the game running in the background while doing something else on the web. Windowed is also much more comfortable for me because I can still see the task menu and can watch what time it is etc.

I actually think my hatred towards full screen started when I played TS3 because the game would crash on occasion to the point that I often had to restart the computer completely, while in windowed mode I can just close it with the task manager (back then, I didn't know the key combination to open it :D ). Also, the world loading screens in TS3 were quiet long so I put the game into windowed mode so it could load in the background (it always seemed to me like it took longer when loading in full screen while I minimized it).