Splitting the halves with a friend to see who gets the creamier half. Licking out the center before dunking into a large glass of cold milk. Attempting to eat the whole package in one sitting. Seeing how black your teeth can really get.
All causes of great delight.
But in my book, nothing matches this: watching a little one munch it up like cookie monster. Nom Nom. Crumbs flying everywhere, smearing cookies 'n cream in his hair....