Chocolate or Vanilla?

Why does everyone have different preferences? Why are some people more picky than others? I'm not sure why this has been on my mind... maybe because I have been around people who are very picky eaters, while I am the least picky eater you will find. There is only one food I've tried and did not like, and that is goat cheese. And what is the likely hood of eating that again... anyway... it still boggles my mind as to why some people wont eat anything that is the color green, or has any slight "fishy" smell. What's the hurt of trying new food??? The worst case scenario is you end up eating something that you don't like and tastes disgusting... but you will lose the taste in your mouth within minutes! I guess I'm pretty easy going with this stuff.. my motto with food is "I'll try anything twice." I like to give things a second try.. in case it requires a quick required taste. Well there you go!