Yeah, one you didnt mention is caffeine. I'm so terribly dependent...I get tired with or without it. I tried cutting back from the coffee...somebody coughed outside and I got so angry i tore my head off.Cocaine is a physical addiction, as is nicotine, heroin, alchohol, and other barbituates. Physiological addictions are the hardest to overcome. The fact that you say physical addictions are nothing compared to psychological is astounding, and contradicts both science and logic.
True story, it really happened.