I only have 2 bents and a couple that are 1/8 bents.
My favorite shapes are Canadians, billiards and Lovats in that order.
It's just a matter of what shapes are most appealing to me.
Other than the possible tendancy of some bents to gurgle and their being easier to clench because of their balance, I don't think there should be any difference in potential smoking quality between them and straight shapes.