I've always loved bull mastiffs. I think they are the most handsome out of all the mastiff breeds, hands down. Big and bulky but not too much to the point of looking slow and sloppy. Good muscle tone. Tighter skin. Plus, their history is quite interesting.
Do blake and aslan get along well? Whos the more dominant one? Are they neutered? The reason I'm asking is because I've always wondered if Reggin would get along with another male if I added one in the future.