For everyone that wants to know where the sweetspot for a certain item is, we'll use this wiki. If it's not here, and you do find it, please post it in alphabetical order please, and in the format of:
Item Name +/-/0 (Default)
Mining
Iron Ore -2
Fishing
Ash Tuna 0
Bianaq Bream +1
Calcified matter -5
Cultured matter -5
Hammerhead Shark +1
Logging