The place of favorite, in my mind, is a heated battle between blackberry pie and blueberry pie. Berries just seem to be an all-round favorite with me.
It would be apple pie that is the most-made around here. There is something so comforting about hot apples and cinnamon in between flaky pastry. And, I often make our apple pies without any sugar, so it is the pie of choice for me right now.
Here is a picture of a pie I have often made in the summer: peach and blueberry. It really is a delicious combination.
Some of my other favorites include pumpkin, strawberry-rhubarb, shoo-fly (this is a Mennonite pie made with molasses and a crumb topping -- it's very good), red rasberry, and maple-pecan.