I was always like thats horrible i'll never do that. Then I went to uni and with the workload and some personal stuff I ended up smoking. I was on and off for about 2 years, maybe one a week or something like that. Then I completely stopped for a year, one day I just threw them out and that was that.
Then due to things I started again and have been smoking, I stopped again suddenly for many months, but recently i've had a few. I think its everyone's personal choice, but I refuse to smoke around non smokers because its my choice so why should I put them through it. And it never smells my room out because I always have either candles/insense or and oil burner on.