MMM...some of my favs already mentioned here, like skittles, twix, and specially those cookie and cream hersheys!
But, since I don't want to repeat someone else's answer... I would have to pick.. Sour Gummi Worms! I hate regular gummi worms for some reason, same with gummi bears, but sour gummi worms just have a little extra something, and it's not just the sour powder..