To my eye, anything over 30 SRM is just black. 40, 50, 60 SRM... all still black. I notice different categories of Porters and Stouts have an SRM cap.. somewhere between 40 and 60 SRM.... can anyone explain the difference between 40 and 60 SRM? one is black, and the other is, well, black. What else? How can one judge "too black", in terms of meeting style requirements? Is it that color implies a flavor component (stoutness)? How much is too much to YOUR taste?