Dear Janaki,
I wonder why that is, too. Are you a black and white photographer of color? I wonder if that has anything to do with it.
Before I go to bed, I tell myself that I am going to remember my dreams. First thing in the morning, I think about what I dreamt. It takes a conscience effort to remember my dreams.
I did notice that my dreams are in sharp focus, which I really like because in real life I need glasses.
I want to theorize that people who are color blind might have a tendency to dream in black and white. Just thinking.