Let's get this thread started properly:
What's your favorite beer? Tell us a local, cuz maybe we live near you or can import, and then tell us something you like that we can easily get.
Local: Berkshire Brewing Company's River Ale and Steel Rail Pale Ale from Deerfield, MA, US. Very bready and full of flavor. I guess you'd call them "sweet". Great to cook with, too. I'm headed down to Virginia in a couple of weeks and am planning on bringing some to live with us in the basement while my cousin and I build up a 3-speed.
Nonlocal: Samuel Smith's Oatmeal Stout. From England. Until I discovered the BBC beers above, this was my favorite beer. It's similar to the BBCs in its yeasty, grainy flavor.