My buddy put in a 18x8 garage door, as opposed to the typical 16x7 door. This is on an attached garage. The entryway is proportioned correctly with a larger front door. Funny thing is, he lives at the end of the street that goes into his neighborhood (one long straight shot) so when you pull into his neighborhood, you see his house at the end of the street.
His house is only 2000 sq/ft, but it makes the houses on either side look miniscule. Plus, as you drive up the street, you think you're closer to his house than you actually are, once you get there, you wonder if Shaq lives there.
His house looks normal from the front, but his garage is two cars wide and two cars deep. On the outside rear spot, he has a normal 16x7 on the side of the garage. The inside rear spot has a 12' ceiling. He has a Rotary 9000# Assymetrical lift on that side as it has a thickened slab. I have garage envy.