Well I'm not sure how far the list is, but here's one I thought of. I'm a bit hesitating to post this, cause this may sound a little too selfproclaiming, which is not my intention. If you don't like it it's fine, but Prof. Demetri did find it funny so I'll take wild guess here:
Were are we keeping all the chest items ideas that have been submitted with the levels? I know I came up with 3 items and submitted them with the levels.