This is a personal opinion based upon my experience and personal knowledge. Although there are a few factors that should be considered when choosing a new construction house design, the general consensus has been that a garage should be as large as possible. The garage needs to be big enough for a car, a motorcycle, or a small car.
I am the type of person who will organize my entire home (including closets) based on what I need for vacation. Making sure that all vital supplies are in one place, even if it means putting them into a carry-on and checking out early from work so as not to miss any flights!