Sam Adams is a good backup beer for restaurants that don't have a good selection. If I don't have a better choice, I'll certainly order a Boston Lager, Noble Pils, Alpine Spring, or Oktoberfest. However, they often fall flat with their limited releases. Granted, all breweries have some beers that are not to my taste.
I tend to purchase seasonally, with a few year-round offerings falling into the rotation every few months, and purchase a lot of beers that are new to me. So, I don't purchase many beers repeatedly over the course of a year. So, my Sam Adams drinking does tend to be limited to those occasions I mentioned earlier in the post. I generally won't take a chance on one of their special offerings if I'm purchasing beer at the store. If I'm going to take a chance, I'm going to go with a smaller brewery that will benefit more from the purchase.