I loathe a chocolate beer, or any other such testicle-neutralizing fru-fru nonsense, but a beer that has a flavor like that of chocolate can attract my attention. Imperial Stout is like chocolate, coffee and whole grain bread mashed into liquid, run through fire, and then smoothed in vast casks of ancient stone. It has a smooth flavor and feel, high alcohol punch, and dense labyrinth of flavors.
Now, keep in mind that reviewing Sam Smith beers and giving them the thumbs up is like shooting fish in a barrel. The shocking review would be one that found one of their products inferior, mainly because they do a good middle-of-the-road job turned up to A+ levels. It is hard to find a better brewery, at least that does not involve hiking for a day to meet some rather spaced-out monks. But, the question with Sam Smith is how to enjoy their beers and why, because not every beer fits every occasion.
With that in mind, Imperial Stout is not an everyday beer. It is more a ceremonial beer, probably more appropriate for the center of the day than its end. It is unrelentingly rich from start to finish. This is best drunk in an iron flagon with a thick cigar in hand, preferably while holding a weapon and/or torturing dissidents. It is a strong, violently excellent beer that may not fit except during special occasions in your life.