Suggestion: Make items like Backgrounds, smileys etc "useable" from your inventory and remove them afterwards.

I have like 25 Backgrounds, emoticons etc flying around in my inventory. It would be nice to have a possibility to "redeem" them, like you redeem a profile background and can use it from the moment you redeem it, but it is no longer shown in your inventory, and you can now access it via "edit profile". Same fo emoticons, once you redeem them they come available in chat and disappear from your inventory. A nice feature would also be to add the emoticons to the smileys-box next to the textfield in the chat window for easy acces to your emoticons so you dont have to remember all the shortcuts.



EDIT 1:



I would also be fine with something like other inventory tabs. There is one for every Valve product already (I have one for TF2, Portal2, Dota2 and Steam) and it should not be that hard to implement some for trading cards, profile backgrounds, emoticons etc.