I wanted to find a particular piece of non-Moggable RP gear. I thought Kaelinda might be the one who had it. When I looked in her bank, this is what I saw:
What a heap of stuff! Thank goodness for the bags & bank search function!
She didn’t have the item — and neither did anyone else whose bank I looked in — but it’s a craftable from a past expansion that had a readily available recipe purchase cost and a cheap enough materials cost that I simply acquired the recipe and crafted it.
Just looking at that overstuffed bank made me feel a bit overwhelmed, so I decided it was time to clean out all the stuff she’d been hanging on to for Mogging purposes and hadn’t really needed to since the introduction of the Appearances Collections during Warlords.
I didn’t get rid of everything, though. I kept any items that are no longer obtainable, some white quality (non-Moggable) items, her Legion Legendaries, an assortment of other expansion- or patch event-specific items as souveniers, a handful of Soulbound grey quality items with interesting flavor text, a few readable documents from quests, and holiday clothes (just in case she ever wants to wear any of them out-of-season).
Ahhhh, much better!
One of these days, I ought to get around to doing the same thing for Kamalia, Kerisa, Kaylynda, and Karaelia…
Kamalia et alia 
Why, that looks like MY bank!
I have a bit of the same as you, for me I keep the trinkets that do things like call three dogs (in case I ever want to astonish my friends who won’t notice).
😀 There are some items that are just too fun — or too fun in concept, even if I never actually use them — to discard!
In which Wrath gets an education: now I know what KonMari is.
Heh heh 😀