I loved the physics engine in oblivion, how dropped items would move around the world realistically, and I always had good fun jumping up on fully decorated tables and just kicking everything around. But one of the things I loved doing in Morrowind was displaying my items all throughout my house, perfectly placing all my glass weapons on one table or making a stack of books placing a lantern on top, then removing everything so as to have a new lantern on my ceiling.
I could never really do that in Oblivion, as one wrong move, or one accidental bump into a table would send everything flying. For display purposes, would you like to lock, or disable an items physics to keep it in a set place?
And when I say lock or disable the physics of an item, I am thinking more of something you could toggle, so items would have physics unless you wanted otherwise.