I think, you are checking your own abilities to detect smells. Of course, every living creature has his own personal and very much unique smell (I'm not sure about particular smell of a particular breed, though I believe, that is not impossible). Personally, I'd say, for me some dogs smell repulsive, and some smell pleasant. If you want to educate further your own nose and to know more about an amazing world our dogs live in, but of which we are almost deprived, read this:
"Scent and the scenting dog" by William G. Syrotuck.