I read from Nevil that he liked to use short flowering BLD female with a longer flowering NLD male, just because the female flowers faster and you don't have to wait so long to pollinate the plant as with a long-flowering female.
As Sam and Chimera said in this thread, there isn't very much data that males donate certain things to a cross and females something else, thou this is a popular belief; meaning the sex of a certain plant isn't so important, but it's actually the individual's (male or female) traits that count.
..so if this is true, it shouldn't matter if you use male of female BLD to this hybrid.
