I never want less than 12oz unless I'm sampling a new batch, gauging its readiness. I never understood that aspect of it. Who wants just 2oz of a beer? If it's good, pour a damn pint and quit bein' a wuss! Or if you bottle and someone wants a sample, pour them 2 oz and pour yourself the rest. Beer isn't that hard to drink, is it? I'm thirsty for a beer on a friday afternoon, can you tell?
Other than that, I like kegging because it's just easier and cooler. I still like to bottle hefes though for the yeast sediment, because they usually clear a little more than I'd like in the keg.