WY - what kind of physical makeup do you have? Are you small, skinny and run fast? Then maybe linear is for you. If you have some power and the desire to hit the gaps (and more), the rotational swing will probably be more to your liking.
To me swinging down on a ball moving downward is a dicey proposition, if you're trying to hit line drives. Swinging on the plane of the pitch gives you a much bigger zone of forgiveness, as well as the opportunity to make solid contact that will results in line drives.
good luck either way you choose...