I have two very picky eaters.. and I think both of them were due to their father's influence. (When an adult man spits out a mouth of food because it's nasty... well, the kids are gonna follow suit.)
One of them actually only lived on bologna, saltines and white grapes for 6 months when she was six.
Since their father and I divorced, slowly but surely their tastes have changed... Now their favorite meal is Thai green curry, and anything made of chickpeas... all of it as spicy as I can make it.
And they love it when I experiment with new foods. :-) I am now a happy mom.
(I do have to say though that new shoots of pokeweed has always been one of my springtime favorite meals...)