I'm sure it just varies a ton from person to person. As much as some people (notably alcoholics) find it extremely difficult to stop drinking, I pretty much stopped without even trying. Got married, had kids, stopped hanging out so much with friends. I just didn't drink for months at a time and didn't really notice. I never consciously quit drinking, but I average maybe 2 drinks a month now and don't miss it. I also never really found that alcohol really relaxed me emotionally.