Yes I will always taste the grains when weighing up a new batch to ensure grain freshness. I don't want to put slack malt in my beer. I also like to taste if its a new grain that I haven't used before. I am also partial to chewing a bit of hop if its a new variety. I don't eat the grain for breakfast of any thing though and have never chewed the grain for enzymatic activity as in Sam Calagione Chicha brew edition. but then has anyone tried to replicate that?