For proving genetics of unknowns, for creating more of the same dominant morphs, and... if you end up bringing one to a kid's classroom for show and tell, you bring the cheap normal and not the bumblebee. 
I believe the general idea was that normal females can do a lot, normal males are actually starting to be replaced with pastel males.
If you can afford to just buy/produce all pastels as your base stock, then there shouldn't be a problem.
~jenny
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"Polysyllabism in no way insures that what you're saying is actually worth being heard." - Blake (an e-friend of mine)
"I have never made but one prayer to god, a very short one: "O lord, make my enemies ridiculous." And he granted it." - Voltaire