Late one night I was playing with some 2x2 bricks and ended up with some simple "textures", for lack of a better word, basically placing the bricks together in various ways.
Wall #1 (inventive name, huh?):
Wall #2 "front":
I liked this one enough that I played just a bit more with it:
Credit: I did get some impetus for playing like this from Tinkernology's blog (http://tinkernology.blogspot.com/2009/10/fridays-idea_30.html). Very good blog; check it out.