I think it effects people differently - I smoked it every day for over 15yrs. I stopped about 10yrs ago.
........ I was always a heavy sleeper anyway but, the first 2 weeks after knocking it on the head, I had some really vivid dreams - not bad ones, just some mental ones and a couple of really good ones
it doesn't take long to get back to a regular pattern
Although, I will admit, I do sometimes fancy a smoke now and again, and a glass of orange juice and lemonade with loads of ice