So far as domestics, I like Bud Light and Coors Light. Miller Lite is not one of my favorites, but its drinkable, especially when free.
My favorite import is probably Newcastle Brown Ale, but that dark beer taste is not for everyone.
Bell's Ale is a great microbrew from Kalamazoo MI, and worth trying if you get the chance. Their Amber Ale is especially tasty, but its only available in fall/winter.