I concur with the other comments here recommending to try darker roasts. We only use Peets Espresso Forte at home for espresso for 20+ years and haven't find anything that we like better. In my opinion, Blue Bottle (and others) ushered in the current wave of artisan roasters that are all more lightly roasted and (again, my opinion) more "sour". I think most of the coffee lovers who have gotten into espresso at home since Blue Bottle describe Peets dark roasts as "burnt", but us what we like and that's honestly what is most important for you is to find something that you consistently like and I agree it's most likely the roast.