Uh, why dont we come up with new door ideas other than copying Lego?
because this game is supposed to represent legos, so its better to get those in first then custom ones...
How about the hatch door that looks like this:
On the non-LEGO front, one of these would be super-useful:Good for offices, schools, and contemporary houses.
Shutters please :)Maybe as a separate brick you can place next to the window?