I like to play as a pirate and to maximize the profit I need to keep discarding the masses of iron the freighters drop. So a mod that lets you set a filter to your inventory, so that you only pick up the wanted item, or ignore a special item.
Alternatively a mod that just stops stuff from getting sucked into the void my full inventory apparently creates behind me.
I would have like a choice whether I can take it or not, like the items show up, and asks me if I want them. If not, they go back in the cargo thingy and If I want them for later, I can get them later.