I once read a book called
Secrets of the Sages which was basically a collection of interviews with people in the game industry including several of the guys that made half-life, unreal, mario (Morimoto?, I can never remember his name), fallout, etc. One of the guys said something very interesting. A lot of game designers give up fun for realism. They'll say "Hey you can't change direction in mid-air in real-life", when they should have said, "Wow, that was so much fun!" (yes he did point out mid-air direction change specifically) I hope TGC allows us to change direction in mid-air. What's the harm, as long as it's fun?
Now is the winter of your discontent.
-Stewie from Family Guy