For organizational and filtering purposes, users may tag their reshares (e.g. "#reshare" or "#reblog"). This is a common occurance on Tumblr as far as I'm aware. However, as someone who prefers to use the quick-share feature (alt+click on desktop; hold and swipe on mobile), I feel less inclined to tag my reshares due to the extra unnecessary work that defeats the purpose of a quick-share, even though I see the potential benefits in actually tagging them.
It would be nice if we could specify a tag in our page/account settings that is automatically added to quick reshares (or perhaps all reshares, in general). This would be an opt-in feature with the option to disable the auto-tagging at any time.