- Pro: You can alt-tab out the game at any time, including during loading, without breaking anything and without any costly display mode switch.
- Pro: You can interact with other programs on any monitor without the game minimizing.
- Pro: The screenshot button, Print Screen, is more likely to work (i.e. it'll work as well as it does in windowed mode).
- Con: The performance suffers a small amount. I believe it is <5% but will vary.
You'd still be able to turn it off, but I believe the pros easily outweigh the cons. Do people agree?