As a player, I would find it unrealuistic and boring after w ahile if, after every defeated monster, their bodies disappeared and turned into a pile of coins like they did in Diablo, but quite often I think it would be inappropriate if at least the mnore intelligent foes didn't have SOMETHING shiny stowed away in it's lair or some gold or silver in its beltpouch. If there is treasure, it shouldn't be a matter of "Okay, you killed the monster, and you find this, this, and this"; there should be an active search made for the good stuff.