I took a public speaking class in college and managed to make the class laugh a little bit.
I had the interesting experience of having lived and worked for six years in China with Procter & Gamble, and that just changes, I think, your whole perspective in living overseas and living in a country like China.
You may be pulling from different influences because of different things that are going on in your life, different people that are around you and more experiences to pull from.