Not once have I smoked marijuana (EDIT: or done any other drug for that matter, but I do have a drink from time to time). Have thought about it when the scenario comes up but because of work situations I have been in most of my life, I have never tried it and really it is not on my list of things to do. Many of my friends growing up and siblings smoked it and still do and I still even in my 30's have never once touched it.
I do however understand some of the medical purposes of it and am not against that whatsoever, but also being a part time firefighter, I am against anyone operating any type of motorized vehicle under the influence of any narcotic or alcohol. I have seen to many accidents with it that have cost people their lives, other than that smoke it at your home and I could care less (just don't smoke in front of your kids either

)