With the photos of honing arsenals and frequent posting comparing finishing stones would some of the Honemeisters offer up the criteria they use to determine which finishers go on what razors?

What factors affect your choice? Is it grind of the razor? Type of steel? Brand peculiarities? User preference? Whim? MOJO? It is obvious in the hands of the experienced results can be quite varied with any one choice of stone so how do you reduce the variables to get to the best edge?