Do you think food pickiness & only eating "kid food" has is more nature or nuture?
From my experience, with the kiddos on both sides of the family.. It seems that the side that indulged the "kid food" & didn't even make the kiddos try a variety of new things when they were younger are the ones that have the super picky kids.
The other side that made their kids eat what was available & only caved with "kid food" some of the time has kids that are significantly less picky.
Therefore, in my experience, it seems like its more of a nuture thing than a nature. Granted, I understand some of us just don't like certain foods, blah blah. But that's moreso taste as opposed to general attitude towards trying new things.