Actually I love the sound of my F150 4.9L big block inline six. Yeah, it's no hot rod, but it has torque you can feel in the seat of the pants, and with a Flowtech Raptor muffler and short turnout in front of the back wheel, it sounds great. Hence, my theory that any big block can sound good, but only certain engines (most V8s, some V6) sound good at smaller displacements (and I am talking displacement of individual cylinders, not the entire engine).