My phrasing may be confusing, but I'm not sure how else to describe it. Is there anything specific that dictates what or how you add to your collection? If so, I would love to hear about it and why! EDIT: Since it's been mentioned a few times, 'no recasts' is a given! Counterfeits are not a part of the hobby and are therefore not included in the consideration of a collection by nature. There is no decision to be made about it. A BJD collection is never recasts. For example, no two dolls in my collection can have the same body in the same resin colour. It needs to either be a different body or a different colour, but ideally both. I want my collection to have a lot of variety or it will feel too monotonous for me. If two dolls have the same body in the same colour, I'd rather have the head share one body - but of course I want to be able to display all of my dolls at once, so I don't want to do that either. Additionally, since I have been a student all this time, one can imagine just how slow-going and limited my activity within the hobby is. For me, having the rule that I made for myself is like a fun game, and it gives me something to do when I'm in school away from my dolls. I can space out or spend hours on different websites just planning for different dolls and what colours they'd be, what bodies I could hybrid, and what I could do with their customization. For someone who spends most of their time in the hobby just waiting, this helps to keep me immersed.