Beer.
I like wine, and I'd love to get into it properly, but it seems like too much of an investment of time / money / liver damage. Beer has the two advantages that it comes in smaller portions so you can try a lot more variety in a short space of time, and that even the most expensive and unobtainable beers are basically accessible if you can be arsed, whereas you'd be lucky to try (say) a premier cru Bordeaux in your lifetime. Also, at the moment, it just seems more diverse and interesting.