The doors are longer when you have 3 doors vs 5 doors, so it's good for us taller people.
Crap for tight car parks tho....I have to park in one everyday for work and a 3dr is not convenient to get out of because you can't open doors far enough without dinging the car next to you or without crushing your fingers as you put them between the two cars' metal work. ( I hate parking dings and will do everything I can to avoid them although my car has picked up some beauties since I got it )