To the OP:
If you quit "cold-turkey" expect some rather vivid dreams. (JMHE)
I just recently ran out, and this is the biggest problem for me. I have vivid nightmares every night, which makes me try to avoid sleeping. I mean, best friends getting run over by busses and torn apart by wild animals kind of f'ed up vivid nightmares.
That, and during the day I'll ocassionally have to fight back bouts of intense anger. Let's call it rage. Usually, I'm solid, and that might be the weed helping me, and I'm just reverting to angry chimpanse alpha staturing. Either that, or a latent desire to rid this world of all the stupid fuckers out there.
Withdrawl symptoms - Insomnia, nightmares, and some rage. Still 100x better than trying to quit cigarettes. Or even coffee.