Nothing fills the void exactly like chocolate. I mean that when you have a hankering for chocolate, nothing can quiet the hankering except chocolate. It's melty and comforting, with the ability to give (in the worst of times—and we've all had these) eat-it-with-your-eyes-closed relief, the thing you need at the moment you need it most.
...in everything and anything else:
Milk chocolate? Dark chocolate? White chocolate? Claim your allegiances (and defend your claim!) in the comments.