[quote=@AndyC]
I imagine a lot of folks have learned the "ignore the blonde" strategy from [i]A Beautiful Mind[/i], and rather than go for roles that usually have a lot of competition and risk disappointment, they find a more obscure character with less chance of someone else gunning for the same spot.
[/quote]

It makes a path for someone to pick up that character, too. Increasing the likelihood of having someone to work with because they get the popular character.