Yes, I smoke, and I hate it. I don't like other smokers, I KNOW it looks stupid, it's expensive, and girls don't like it either (unless they're smokers themselves). I'm actually a very considerate smoker, as I don't smoke indoors, around other people, and I NEVER throw buts on the ground (these being reasons I think people hate smokers).
As for why I haven't quit? It's really, really hard. I've tried many times. It's difficult to explain the compulsion to smoke to someone that doesn't. Think about something you do that gives you comfort and relaxes you. Then imagine that you just can't do that anymore. It sucks. The thing is, there is no one FORCING you not to, so eventually you just think "Why not?" and do it anyway.
I think I was pretty much destined to smoke. My dad smokes like a chimney to this day. He used to smoke around me all the time in the garage, in the car, etc. The first cigarette I smoked I stole from him.
The worst are the anti-smoking nazis. Not only is it completely rude, but it actually makes me want to smoke more. Nothing makes me want to blow smoke right in someone's face more than an idiot that feigns a cough as they're walking by me.