I will 2nd the Lagunitas Little Sumpin', but they also have a "Brown Sugga" that is awesome.
Also Anderson Valley is a good beer. I haven't had one I haven't liked yet. The Boont Amber is good, but the Brother Davids Abbey Ale is also good. I haven't had their Wild Turkey Barrel Stout yet, but a guy I work with says it's very hard to get, but worth it if you can get it.
If you like hoppy, then Dust Bowl's (Turlock, CA.) "Hops of Wrath" is good.