Family holidays. It fits the five of us and our gear nicely. The Metro's only a 4 seater and I wouldn't want to shoehorn all of us in my wife's Stratus for any longer than 1.5 hours (ie. trip to Calgary or Edmonton).
The Aerostar's size, classic Ford ride, shear power, air-conditioning, and comfy seats are all pluses during 8-9 hour stints through the mountain passes to BC. At 90 km/h I can also coax 25 mpg out of it.