Over the years my Where has changed many times. At first I didn't have a designated area for my desk, then I did. Even with a designated area I often found that a change of scenery could loosen writer's block and set the words flowing again.
So I guess I'll never be monogomous with my Where.
Others of you may need the comfort of a specific chair facing a certain wall/window/photo/etc in order to slip into writing mode.
It's all good. Remember from yesterday, the important part is that you WRITE.
I've written in doctor's offices, car pool lines, at church, at my kid's recitals (while waiting for it to start!), in the car on long trips, by the pool, on my back porch, sitting at the couch/kitchen table/desk, in my closet in the middle of the night and laying in bed. There were probably a few other places, but you get the idea.
Tell us, WHERE do you prefer to write?