It depends on what kind of drunk I want to get. Usually, if I don't expect to have any prospects I get a beer like guiness or Heineken or some good beer like that. If I'm on a date nothing is better than happy horny red wine; Green Chartreuse seems to work as well. If I want to get smashed there are a whole host of options.
I hardly drink though and I've only drank alone (as in in my apartment by myself) once or twice in my life.