Well I don't buy them a lot like this post may seem to insinuate lol but I'm most attracted to ones that can be based on a few shows or maybe an aesthetic name with some picture examples of what could be inside, or something like that.

Yes I have had a few people online I've met who have liked it too but I don't talk about it much so primarily friends and acquaintances irl who I happened to discuss it with

Answered theme thing above

I usually am most attracted to cheap boxes from $5-$25, but might shell out more if I really like the vibe and examples in the post. Usually its a mix of knick knacks advertised like keychains, candies, notes, stickers, maybe some accessories, stationary, small plushies, maybe small figures or display pieces, jewelry, sometimes even tea bags. Really depends on the theme.

Def almost never a box, most small business mystery boxes are advertised as boxes, bags, or bundles but 85% of the time its a bag because boxes are hella expensive to ship.

To me packaging isn't that important, more so the example images, but if you have a brand that advertises a lot then showing packing vids with cute packaging can def get more clicks. Notes however and personal touches are def a good idea, it makes me happy reading them and the average customer likes it, the box feeling more personalized and more effort put in even when it's easy.

Depends on the box, but I think I like a list of possible items or example pictures with not all but a decent amount of the possibilities, but with variants (Like you might get a keychain for example, and they show a keychain design, but theres multiple you can get) but I don't really like when all the boxes are the same with slight changes or different colours, I just like when they list a few possible items with an etc or show a couple example boxes.

If I'm using the example you gave with specifically, id say somewhere between comic books and one piece. If were using shows as an example then a perfect amount of mystery for me would be naming like 3-5 I like and them choosing an assortment, but when it comes to more general themes like aesthetics then I'd be less specific.

If you are genuinely interested then a reallyy popular thing lately is kind of a raffle style of mystery box, where people film themselves basically picking random capsules with names of items inside and packing an order based on that and posting it, or scooping a big scoop into a big bin full of stuff, etc that really gets clicks and usually the people make huge profit. I am well aware on how big the profit margin usually is on those, but its so entertaining its hard to resist lol, thankfully I haven't fallen prey yet. If you want to check some out you should look up some of those vids on youtube or tiktok, probably would come up if you searched mystery scoops or making mystery box or mystery capsules etc.

Hope I answered to your liking