I have been discovering the joy of mixing different types of whole bean coffees before preparing them in my French press. I find that as long as you don’t do something crazy like mix a very light roast with a very dark roast you can end up with a lot of extra depth and roundness to the flavor. Thoughts? Am I insane? A heretic??? Have you tried it?
I don’t do it but I’m not opposed to it personally as long as the beans are within reasonably close roast levels.
I don’t understand how you can get good extraction with mixed beans of highly varied roast level; but if you can and enjoy the result then hell yeah; good on ya! Good coffee is life!