Once again I don't know if this has been suggested or not (probably has) but if not here gos.
This simple feature would allow to turn getting whites/greys/(maybe oranges) off so that you would only get items worth your while. It WOULD NOT increase the chance of you getting a rarer item, just make it so that if you did get a white/grey/orange, instead of that worthless item being added to your inventory you would just get no item at all. maybe instead of item get a little extra gold from creature you just killed. Don't know if this would work but I do know its a pain getting bad items and having too many items in your inventory when your trying to join your friends dugeon or something.
(Note: this would just be an option and if you still want to collect those items you could turn it on or off)
hope u guys like.
also couple people have said that you can just liquidate for money. Well if you just got the same or about the same price of liquidation in gold from the creep you just killed then you don't even have to liquidate at all because you get about the same amount of gold from the creep.