I've only ran Diesel 2.0 and Katana 2.0, but between the two, I liked Diesel better. Of course, I'll be trying Beast for the first time (as well as doubling my dosage for Katana) in October, so my opinion on a favorite may suddenly shift. Just a shame that it won't matter, as Beast and Katana are going away forever. Hopefully, MRSupps will find some newer (and better) P-H's to fill the shoes that Beast and Katana are leaving behind...