Marijuana for sure. I'm a daily smoker and mix it with my tobacco, but I'd rather have it clean and pure on it's own. I have a small pipe that I sometimes smoke straight mj out of and that's always a nice smoke. Like bongs too.
As a consumer of both, I'd pick marijuana over nicotine any day of the week. I don't regularly smoke cigarettes except about one a month, but I do have a vape mod and I go through at least two Mr Fog disposables a week(not proud of it myself but my anxiety is through the roof when I'm not smoking something). Weed is just a way for me to cope with my bipolar depression, PTSD, and other mental illnesses I have. Plus, it's just fun.
I mean I'd vote weed over tobacco of course, but I don't really smoke anything. I don't really enjoy smelling any type of substance on anyone, and people that smoke seem to think they're really great at covering up the smell. However, I'd say weed is a lot less harmful than cigarettes and products of that sort. So, that'll get my vote.