Most of my buying is research to find the next thing to brew. Most of it gets drained down the sink. Last purchase was something from http://www.capturedbyporches.com/ourbeers.html?lcat=2
, comes in a flip top with a $1.00 deposit so you can keep the bottle, took a few sips and trashed it. They suckered me with the bottle. I'll buy a Rogue every once in a while and have only been disappointed once with the orange wheat, otherwise everything was good.
I find most commercial stuff to either be too tame/boring or poorly handled and not all that fresh tasting. Something about $.20-$.40 per beer is also more appealing.