I would live to have a bag or something to hold all my keys so I don't see them when trying to sell things. I know I can lock them all down but that makes my inventory bag so long. Maybe if you lock a bag, all items in the bag don't show up on vender. That would work
Yes I would love a key chain too. We need much better sorting of our inventory items even though we do have the filter which I use all the time.
I always have one small bag in my inventory that I rename to "reagents," and another (usually a backpack) that I call "Keys and Misc," and I keep keys, repair kits, and such there. My vendor in Braemar sells bags and backpacks. Because inventory organization is so awesome, these are my best-selling items. (first vendor on the right, when you enter from default entrance.) I highly recommend using bags and such for this, and then hiding your quest items and equipped tools (inventory options, little gear thing). Makes it look a thousand times better.
Yes, they would be nice... Similar things for UO and WoW were implemented, but implemented well after launch. This would be a good post for the Wishlist Requests forum.