Spellbreaker is pretty useful it's what basically validate block as a class. Mages? Dragon? Not a problem anymore.
I did like what I did with Ebony Blade, I knew my good character would never use it and I didn't want to leave it anywhere where it might infect people like it did the Jarl's son. So I traveled as north as possible, swam as far as I could. Found a very part of the ocean, stood on a ice block and dropped it into the water. Dived in after it to watch it sink out of my sight. I know it's gonna turn up again, but at least I've saved the world some pain for now.