Dennett shares the distinction with Dawkins, Harris, and Hitchens, of being one of the "four horsemen" of New Atheism. He is a philosopher, writer and cognitive scientist, whose research centers on the philosophy of mind, philosophy of science, and philosophy of biology, particularly as those fields relate to evolutionary biology and cognitive science.
I am fascinated by the philosophy of the mind. Like Dennett, I believe in physicalism, which holds that all that has been ascribed to "mind" is more correctly ascribed to "brain" or the activity of the brain.
At the recent Global Atheism Convention in Melbourne, Australia, Dennett gave an amazing speech titled "How to Tell You are an Atheist." If you don't already self-identify as an atheist, I highly recommend viewing his presentation on YouTube. You might be surprised.