I stay sober because alcohol is a ****ing poison! Anything more than one standard drink is like lighting a match under your liver. In mass quantities, it interferes with normal functions of your metabolism in nasty ways, sometimes mimicking the symptoms of untreated diabetes (see ketoacidosis).
Society really doesn't realize what a nasty substance ethanol is for the human body. The only reason we can metabolize it in small quantities is because our ancestors had no choice but to eat rotting fruit. Taking a scientific perspective on my alcoholism has helped me to stay sober.
Sky high ALT and AST levels have a way of doing that too.