If we're talking fruit pies I'd probably be very generic and say a nice apple pie would be my favorite go-to.
Of course for regional pies, the most common pie I see around the state the most is a vegetable pie known as rhubarb. A nice rhubarb and wild berry pie can be enjoyably tart and sour with that delectable hint of sweetness that rounds out the sharpness of the ingredients.
I'm a child at heart so my favorite pie will always be a chocolate cream pie. I mean, I like apple pie and rhubarb pie and pumpkin pie just fine, if someone were to serve me one at a dinner I wouldn't just throw my slice on the floor in disgust.
But I'll usually prefer something like a dark, moist chocolate cake or a cheesecake over pie anyway.