Not sure if this is the right forum for this. I am a long time homebrewer and think my beer is pretty good. People tell me its pretty good. I want to take it to the next level of quality and consistency and toward that end I need to know what off-flavors are. I need to taste them. Do any of you know where judges get standards for tasting? "This beer is tannic" or "this beer has esters" etc. etc." Where do you get those references? I am thinking to truely know if I have good beer, I need to taste some objectively and well characterized "bad" beers. Also I would like to know what the differences are due to. SNPA tastes different from Anchor Steam but what all is that due to. (talking the finer points here).