Some very good points raised there Sir_MAD, I like the idea of perishable ingredients. I find the challenge of catching the toch bugs and butterflies very satisfying, except I always eat them on my Khajiit because, well... it's in character

I always felt the successful harvest thing related to not destroying the source, ie:When picking certain mushroom breeds, if you don't pick it in a certain way, no spores will drop and it won't grow back.
I'd love to see a mod that adds a perishable time frame to ingredients and a skill base to pick them.