Addiction in general is hugely overblown. Somethings are very addictive, most are mild or short lived. If you have a Fing backbone don't worry about it.
m-f i start my day with a quad shot of espresso, and around 10 cups or so of dark roast through the day. when on holiday or the weekend i have maybe one cup a day (if i remember). i have never experienced withdrawal.
When younger, i did a lot of coke, it's not nearly as addictive as they say. you can go on a month long bender, and just stop. It is not physically addictive. Look it up if you don't believe me. psychological dependence could be argued, although you could argue psychological addiction too anything.
Of the three most addictive things i can think of; tobacco, alcohol and smack, 2 out of 3 are legal. Funny eh
I am puzzled by alcohol addiction. You only have to meet a alcoholic to know its real, but if the substance itself were addictive, wouldn't every heavy drinker get hooked? Don't we all know someone that will drink daily for years, and just stop? why do only some get addicted? I have a missing year of my own, but now I'm a "family man" i can enjoy a beer after work with out spiraling out of control. I'm in a better place, i don't NEED to drink.
I guess with my history, and the amount of grass i go through, i have a long running dislike of sobriety. very little of what i've tried, much of which to excess, is more that mildly physically addictive.