One of the things I really liked in some games is that the things you do in the game were recognized by the game and you got rewarded for it. I really loved the system in Fallout: New Vegas where if you killed a lot of a specific type of enemy you started to develop minor bonuses towards that enemy. I was thinking we could do the same thing in Cata. We already track the number of kills so why not give a small bonus to damage. Say 1% after killing 100 zombies (as zombies are very common). We can even come up with clever names for some of them.
I think a crafting stats screen wouldn’t be a bad idea either and you could do the same type of thing there. Cooked meat gives a slightly better bonus (or becomes perfectly cooked(food modifier tag?)) to morale after you’ve cooked it 100 times. (100 cooked meats? Carnivore is definitely the name of that one.)
A second aspect of a crafting stats page could be reducing returns of crafting the same item over and over and over and over. Just a thought towards balance. Please put main thoughts towards the main topic and keep this as an after thought.