Some ideas that might make the life of the materialistic Glitch a bit easier:
Move and switch - when dragging an item to a slot that contains another item they switch places. Would be particularly useful for switching the order of bags without having to drop one of them first.
Keeping track of stuff - the mouseover for a stack of items also shows the total number of that kind of item in your inventory. Useful for... well, for knowing how much stuff you have.
Stacking - a command that turns all of those small stacks of items you sometimes end up with into fewer stacks. Could be evolved into "stack and consolidate" which moves other items of the same kind into the same bag as the item which which you applied the command to.
Well, I think that's it for now. :)