>>81592915 (OP)I would want a harem of two at most, and they would be dating each other too. we could also have casual FWBs but I wouldn't consider them part of the harem in most respects.
>diversityI don't really case so long as they have an interesting dynamic with each other, so they might differ on at least one trait (age, height, race, whatever). or one could be a switch and one a sub. and there's something to be said for unity as well; like for FWBs I'd want them to be the same race as one of the harem girls so we could do stuff like group sex with two black girls and two white guys (me and a friend).