I like straight grips on a smaller gauge gun, like a 20 or 28, and pistol grips on larger bores. I can't see a straight grip on a 10 gauge, for instance.

But mostly buy whatever you think looks best. When the moment comes and lead starts a-flyin' you won't notice what type of stock you have, or what length of barrels you have, or what type of chokes you have. All you will know is feathers flying, barking, and tail wagging. If you have a dog, you will also see him running around.