I am a great baker I like to bake pie. 
What goes into making one?
Usually I make and roll the dough and put in the filling and there you have it.
How are pies defined? What makes them different from each other
I think it goes by the filling inside, there are fruit pies and meat pies as far as I know. Do you know anything about them?
Yes,  I know they are defined by their crusts more than anything. I like top-crust pies
What are some top crust pies?
An example would be a shepherd pie. The filling is in the bottom and is covered with the pastry