I was an NBC page during the Leno years. Jay Leno would come onto the lot in the morning, work with the writers and producers throughout the day, tape the show at 4:30, then most nights would get on a plane and do a comedy show in Vegas, fly back to Burbank, rinse and repeat. He was one of the nicest, hardest-working guys in the business who truly loves making people laugh. Yes, his car habit was probably anti-mustachian, but he wore the same outfit everyday (denim shirt and jeans), so he saved money there :)