I would like to see an in game collectors ( insert book type here )
The tome , guide or whatever it is called should list every material, item, equipment, monster, quests, you name it. If it can be obtained or found it should be listed in the book under the right heading with images. All listed as ??? or unknown until found by the player or in monsters cases fought. The book should also list badges and titles that can be obtained. If such systems are implemented.
Totally make this when the game gets its RPG update