I just picked one of my old games back up, and - as I think we all know - inventory management can become kind of overwhelming in Skyrim, especially when you're using mods that restrict your carry weight. Regardless if you do or not, I think it would be really great to have an inventory hotkey button that can "mark an item for sale" and put a little icon next to it, so that way you know not to throw it in storage (if you're a hoarder like me) and that way you can easily locate it when you go to a shopkeeper.
I think it'd be a really useful quality of life improvement for this game. No idea how to implement it on my own or if it could even be implemented, though. Thoughts?