I'm very lucky in terms of a favorite. I moved from Donegal to Washington DC. And the northeast, pacific northwest and round colorado are all having a resurgence in craft beer.
Within a half hours drive of me, is Old Dominion Brewery, which makes a great Spring Ale, and to the north is Clipper City brewery (in Baltimore)
There is also a shop here called Total Wine, which has a full dunnes stores sized aisle that is only micro brew.
I think my favorites are, Thirsy Dog, Flying Dog, ESB and I got a selection pack of the Saranac brews, which were tasty too.
It changes for me almost weekly because I will pick something up, usually something different each week, just to try.
Allagash White is a tasty favorite too