#1 Snack?

If there's a best snack, it's pretzels.

On what grounds, you ask?

1.  Pretzels don't have a lot of weird ingredients.
2.  Pretzels aren't too sweet.
3. Most importantly, you can't eat so many pretzels that you feel gross afterwords.  The pretzel/person relationship self-regulates and one starts to reject pretzels physically (via excessive dryness of the mouth) and mentally (via disgust) as soon as one has reached pretzel capacity.