I find the ingredient list on shave soap tells me a lot about what the soap is like, and how it will perform. If you have a preference, what do you like to see on the list of ingredient when you buy shaving soap? Obviously YMMV, and tallow doesn't guarantee a great soap. Do you prefer essential oils, natural pigments (or none at all), vegetable or animal based (or mixed)? Do you like the feel of shea butter, cocoa butter or lanolin? How about olive oil, bentonite clay or castor oil? What are your thoughts?