What is your favorite brewery style and why? Did I miss any types? Would you reword my possible responses? I am torn here but my favorite would probably be the Stone-esque one, they have their solid lineup that you can depend on, yet produce a lot of low cost limiteds.
A combination of all of the above. As long as the brewery and brewers can handle it, a core of reasonably priced basics, along with seasonals, maybe a touch higher, depending on the styles. Then a series of more unusual brews, including one offs, sours, barrels, and so forth. Tap takeovers, casks, special events, etc etc.
Local and Regional.... best of both worlds. That said I love all the CA/CO/OR beers that I can get because the good ones are good.
Honestly, whichever is making good beer. I like plenty of beers from craft's relative "giants" like SN and Bells down to my locals that I can only get on tap at the brewery and a few bars around town. I don't think any one distribution format predisposes you to make better beer than another.
Regional but I don't want to say that I don't buy nationally because I do. I like choices. The more choices the better as long as they are all good choices.