Well, what may happen in the next generation is exactly what I want to find out this fall!
My best guess, based on the genetics as I understand them:
Bred to a blue drake... argh... it's so late at night... let's see... the offspring would receive one or two black genes, one, two, or no blue genes, one or no runner pattern genes, one or no brown dilution genes... Sooo.... could be black tuxedo, dark brown tuxedo, another blue tuxedo, silver tuxedo (not sure you'd be able to tell it had a tux though), pure black, pure blue, pure silver, pure dark brown... I think that's it...
There, that clears it up nicely, doesn't it?
Bred to black.. similar results, but without the silver options... I think...
Bred to fawn/white, ... I'll have to fill those blanks in later 'cause my dearest is calling me to bed and I intend to heed the call.