Drink to enjoy; however, I have learned the very hard way that I do have problems with when I choose to drink.
In short, I have learned that I cannot drink when I'm upset/angry/mad/sad/lonely and considering that lately, I am often a combination of those things, I don't drink nearly as often as I used to.
In the 9 years since I started finding my tolerance for alcohol, I've also learned that I can't drink gin, whiskey, Jaeger, some tequilas, probably bourbon, and Scotch anymore. Red wine is allowable in small doses because I'm susceptible to tanin headaches, lighter beers are better than darker ones—except stouts and Guinness, which gets its own category—I can never drink on an empty stomach, and yet I'm still able to down four dirty vodka martinis in two hours and not get a hangover. Hooray for the office party open bar!
I used to drink for effect and other non-healthy reasons. Now, I drink to be social, because I like the taste, and finally way down at the end, for the effect.
If I ever have kids or become a major influence in someone else's kid's life, I'm going to let them know that just like owning a gun, having sex, and driving a car, being able to drink alcohol is something that should be taken as a serious responsibility.
...ooh, that almost got Orwellian...