I did have a brown loaner for a couple days... ok horrible is strong word, but obviously demand was low hence the removal...
Have you ever seen a brown in person, in the sunlight? Most who see them in these conditions do nothing but rave. But there will always be young whippersnappers who think cars come in two colors, Red or Black.
The brown Model X in my dashboard page looks so good with my Green S85 that I really hope Brown comes back in late 2015 or early 2016, in time for the Model X delivery.