I was thinking, and it came to mind that there arent any diagonal doors.
What i mean is, somebody should make some doors that have a bigger base (like 3X3X5 instead of 1X3X5) and the door opens so that you can walk down diagonally into it. kinda like the old basement hatches that were on Tom and Jerry, except more along the line of military doors.
Just a thought. Kind of hard to explain what I mean, too.
there kinda like the one i attached, but more upright.