There's nothing like the contemplation of the universe for making one feel simultaneously awe struck and incredibly insignificant.
Kind of random, but I loved Hawking's frequent use of the exclamation mark. For example::
"However, when an antiparticle and a particle meet, they annihilate each other. So if you meet your antiself, don't shake hands - you would both vanish in a great flash of light!"
and
"The supermassive black hole has a star orbiting it at about 2 percent the speed of light, faster than the average speed of an electron orbiting the nucleus in an atom!"
His pure excitement regarding the subject matter and specific points being made is almost palpable. I wanted to yell "Preach it, Mr. Hawking! Science is awesome!"
I also learned, much to my surprise, that the world apparently doesn't revolve around me.