Anything rules based should be fine.
Some for visual cosmetic stuff. Items. More spells.

However anything related to story add-ons/changes , dialogues, more quests, romances, more companions etc...definitely not happening (go to BG1 or BG2 if you want that).

It just reminded me of the bowl of goat's milk that old Winthrop used to put outside his door every evening for the dust demons. He said the dust demons could never resist goat's milk, and that they would always drink themselves into a stupor and then be too tired to enter his room..