My living room was red years ago, also. Not entirely - I had a chair rail along the walls, so the bottom half was a deep, dark, rich, whore red. I loved it. I didn't have to worry about painting over it. I just moved.
I painted all the walls in another room in another house a cinnamon-like color - deep and rich, but not quite as red of a red. I loved that one too, even more than the first. I didn't have to paint over that, either. I moved.
I painted my bedroom a deep green once. This was a rental - surprised as heck my landlord let me do it. So I didn't paint over it - I just moved.
And I put green checked wallpaper up in my kitchen in another house. I can't tell you how long it took me to match up the little squares from one piece of wallpaper to the other. But it looked great. I knew when I did it that it would be a complete bitch to remove. So I didn't. I moved.
I am like needlesandpins, I think. I used to have lots of color on my walls. Now, I think I'm more partial to a neutral background.
I actually like the middle ages map idea.