The inventory gets cluttered with stuff and everything is usefull for something and i occasionally sell quest items. I think there should be some easy way to tell if something is a quest item if it is used for something else. For example Ehlial sent me to deliver some arrowheads to someone and since my quest log was pretty long and my inventory was full i eventually sold them without realizing an hour later what i had done. It wasnt a big deal but i can see this becoming a problem since everything has a use and only items that arent used for anything else are in red. I dont know anything about programing and barely anything about computers so i dont know how realistic this is but i thought i would just throw it out there.