I like beer because I like the taste, it's refreshing, I can sit down with a few friends and we can enjoy it together*, and there are hundreds of varieties.
* Me and my friends (at least that this is in reference to) pretty much only drink craft beers**, and failing that, usually a Sam Adam's. Craft beers tend to have a much higher quality, better taste, and higher alcohol content than their mass produced brethren, but that all comes with a higher price tag. I'm partial to Pale Ales, IPAs, and Stouts. I especially love coffee stouts, a stout that is brewed with coffee. The best two beers I've ever had were both by Stone Brewing Company - Imperial Russian Stout and Espresso Imperial Russian Stout. Both seasonal beers (late spring/early summer), and the espresso one was a this-year-only variation. The espresso one has the highest alcohol content I've ever had in a beer - 13% ABV - and it was fucking delicious. I've got one more bottle of each that I'm saving for a little while, because they're expensive and hard to find now. They were both $9 a piece for a 22 oz (roughly 650mL) bottle.
** I only drink craft beers when I have the option to. If I'm at home or at a friend's house, I'll bring a 6 or 12 pack of a nice craft beer that we haven't tried, but if I'm out at a restaurant or something and my options are a little more mainstream, then I'll go with something of that. Yeungling, Coors Lite, and Blue Moon are all fairly okay in my book for what they are. As I said earlier, we tend to enjoy Sam Adam's Boston Lager a bit as well. I tried a bit of Corona once, and it wasn't bad, but I'd probably take something else over that. But if a beer (or any drink for that matter, flavored malts included), I'll happily and appreciatively accept it, regardless of what it is. I'm not picky but I'm very partial.
Some of my friends would go so far as to call me a beer hipster. I kinda agree.