I smoked cigarettes through high school and maybe a year after I graduated then I quit cold turkey, no problemo. I've been a daily weed smoker for the last 13 years. I don't cough, hack up nasty shit, or feel any negative side affects from weed. I like to puff down before I go to the gym, because it helps me get in the zone, especially on a treadmill.
One thing I'm not is into the whole weed culture. I don't wear pot leaves on my clothing or look like a hippie. People who just meet me would never have a clue that I smoke and I'm proud of that. By outwardly appearances I'm very normal. I love to smoke weed, but it's not everything to me.