Another possible quirk: A hammer randomly ‘eats’ some stone instead of dropping it, but fills the hunger bar (but still uses energy as normal) a little bit when that happens. At the highest level for the quirk, it would eat all the stone and always fill the hunger bar instead of draining it.
That way people that dislike having infinite XP via stone crafting would have something to be happy about, and it would provide an alternative for carrying a million prime steaks in exchange for the loss of the potential stone crafting xp.