>>2914334
My biggest point of frustration is having the same pic multiple times. For example, I had the same couple of pics from 4chan, Pixiv, the panda, from another collection on panda with a different file naming system, from another thread on 4chan, gelbooru, kemono party, 4chan again...
That way I definitely have the same file only once and I can go back and easily sort them into sets where necessary.