I do 3 gallon biab batches with 2.5+ gallons going into 2.5 gallon kegs. I'm in the same boat as mtnagel. Its mostly just me drinking it...wife doesn't drink beer and too busy for much company, so ****** batches just limits my variety! Its a great size for stove top biab.
On Tap: Birch Beer, Millerbräu, Dark Blueberry Wheat, Lil'hop Light Lager
Aging: pale sour solera, yeast bay lambic, dregs lambic