Souvenirs you've saved.

With bag and bank space at a premium with crafting items or different armor sets for different occassions, etc, taking up slots, you probably don't keep much "useless" junk in your bags. But is there something you've kept for a long time for sentimental reasons? An old weapon? A quest reward item? An item that was integral to a quest storyline?

For example, despite the needed space, I still have every two-handed weapon I've ever owned. Most are blues or better, but one is a green. I also still have the [Faded Photograph] that starts the "It's a Secret to Everybody" quest in Un'goro.