If you're genuinely curious, you can start here: Beer Judge Certification Program – Promoting beer literacy, recognizing beer tasting and evaluation skills.I would never have guessed that, and I have tried a huge variety of them. I will have to start paying particular attention - and so will report back. (With IPA and Sours filling the aisles I'm just happy to find a stout or porter I haven't tried; and since a bunch of those are dessert stouts that probably really skews things).
American porter and stout are 20A and 20B.
