marijuana seems to affect my rem sleep negatively. it might seem weird but i smoke a lot and it's often hard for me to sleep more than 5-6 hrs a night. i always wake up way before i have to get up for school and it kinda sucks. might have prob. soon so i might quit for awhile and watch the giant menace that is my tolerance come crashing down. it would be interesting and postive in a way because i have been a daily smoker for around three years.
i enjoy taking a couple days off from smoking because i always have intense dreams when i dont smoke.