Yeah, I used to say no, but having lived in the UK and Japan where smoking is quite common, I don't care anymore. I have a preference for people who don't smoke, but if you do it doesn't bother me as long as your let me bum a cigarette off you once or twice a year when I'm drunk and decide I want to smoke one.
Everyone has a vice and you've just got to let people have it. I drink an absurdly high amount of diet soda daily, but I don't smoke more than 5 cigarettes annually or drink heavily. As long as you smoke outside, don't litter, or smoke in the car I don't have a problem.