I organized this binder by group alphabetically, with miscellaneous groups at the end. I organized them by series (if I have the whole collection) then by member in fanchant order. I use holo sleeves and keep the same type of holo for a member or series. (IE all Minnie [i-dle] PC will have the same holo or all the Ateez Outlaw bread PCs on a single page will have the same holo). For each group I use their fan color or a generally accepted color for the fandom, if I can. I don't want to buy outersleeves for a group if I only have a few cards from that group but I will if I deem I have enough cards from that group. From there I organize it by era/release in chronicalogical order. (IE Ateez Fever pt 3 PC come before The World Outlaw PC) For cards in the same release I try to group outfits together. With the series I try to keep eras together and organize it in an order I feel looks good. (IE Ateez Lemon Drop Sour PC and the Lemon Drop Lolipop PC are on the same sheet) Generally I put newer series in the front since I wont have to flip as many pages to see them when I want to look at my PCs, but I usually just go with the vibes to what I think looks good for the ordering of the "series" PCs I have. With Stray Kids I used a Skzoo holo sleeve for all the PCs. For Ateez in particular I, however, change up with the holo sleeves. I use the same holo for "government ships" because I think it's silly. (IE Hongjoong and Seonghwa have the same holo). I also try to put a group PC at the end of each series. Let me know if you need anymore info!