Do you guys use floor plans when building houses?

I use floor plans but I use them as more of a guide because I always wind up making them look a little different on the inside but even though the inside would be right, the outside never looked like the picture which was disappointing. I used to be extremely literal but then I found that if I make it look like the picture on the outside and then fiddle around with the inside, I am much happier because it looks like the home I am trying to build.