Well, what are your needs? I think everyone should drive the most efficient vehicle they can, given that it meets their needs effectively. So, do you need the room or cargo capacity of the minivan? Have you driven a Prius? More than around the block? I love mine, but I could not own it as my only car as I frequently have to take long road trips and I find it more fatiguing to drive long distances than my Saab, especially in windy conditions. My Saab gets 30mpg at 75mph and the Prius gets 42-45mpg in the same conditions, so the advantage is not worth the sacrifice. Where the Prius shines is as an urban/suburban car, or for long commutes to work, imho.