These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Magnum Opus: Extreme II: Pornograffiti is the usual choice, but III Sides to Every Story has its fans
Signature Style: Hair tinged Funk Metal with neoclassical guitar parts. Although a very sizable portion of their music is done in other styles, this is the style they are mostly identified with, and is most prominently featured on their biggest hit album, Pornograffiti
Signature Song: "More Than Words" easily. Their other notable hits / runners up are "Play With Me" "Get The Funk Out" and "Hole Hearted". All of these, with the exception of "Get The Funk Out", would count as Black Sheep Hits to some degree.