I'm currently on a quest to retrieve the items necessary to fulfill Caillou's order. As a result, I'm curious to know what in-game factors influence item drops from monsters (if any).
Does the level of a monster increase the likelihood of a drop? Are there any items I can wear to make drops occur more often? Will stronger monsters of a certain type(i.e. red slimes are stronger than blue slimes) drop items more often, or drop items of a higher grade? Will chaining together kills affect the quality and likelihood of an item drop? Factors like these are what I'm interested in.