Given the cost of getting things there, it's probably polite to leave things like movies that you could easily replace back home, so others have them to watch.

Personal effects must be like 1% (approximately) of what they ship in, by weight. Consider things like the consumables and construction equipment.

Most things are probably cheaper to replace than to bring back from the most remote area on Earth, and far cheaper to leave for someone else to use than make them bring their own. If unwanted, it’s trash - too expensive to move when there’s presumably an acceptable landfill right there (may sound environmentally unfriendly, but hauling trash back is likely worse).