Heres the theory.
I became a vegan a little while ago and before i could get a DJ keep it for a week or so and be able to remember 2 dreams a night alright.
Now i am a Vegan, and i find it very very very hard to remember dreams. My theory is that people with a Vegan/Vegetarian diet will lack the B12 found in meats or be lacking some mineral that it needed for good dream recall.
Anyone have any ideas on this?