I agree.
I think it's just part of your personality. Some people just get addicted easily. I've got a buddy who can be addicted to anything from cigs/drugs to video games. He veg'd in front of the TV for damn near a week back when Halo2 came out. I didn't believe weed was addictive until I met this guy, and I won't even go into the drug problems.
On the other hand, I like to think that I do NOT have an addictive personality. Granted I can be addicted to things just like anyone else, they just don't rule my world. So, I smoke cigs. I know, bad habit. Need to quit. However, I will often go a few days without one just because I don't really feel like smoking.
Back to the point.
I agree that some people are controlled by their addictions, and others can control their pleasures.