Seems like moustaches are very popular among pilots, and I'm considering have one in order to increase the realism of my simulation experience. Also Headphones + Tracker Cap + Moustache may be the ultimate combo to annoy my wife before she gifts me with "that look".
Another point is that we are in March, and there is a tradition called Moustache March in which "aircrew, aircraft maintainers, and other Airmen worldwide show solidarity by a symbolic, albeit good-natured 'protest' for one month against Air Force facial hair regulations..." What more can you ask to immerse yourself in the fighter pilot role!
Feel free to vote in this anonymous multiple choice poll, and share your thoughts in this important matter! :)