I was thinking, Diablo is ultimatly a collectors game, so can we have other "things" to collect, something like art, lore ect... pieces that you pick up and slowly put together, these would be rather rare, all bind to account items. I think this concept could easily be implemented along with the Itemization overhaul.
Why would I suggest making them bind to account - So you can't sell them. The idea for this is so players go out hunting again. The art, and lore could then be compiled into completed books, that players then look through at there pleasure.