I have everything that has been released, so only the un-released items. I only have pictures of villagers that are living/have lived in my town(s). I will have to wait until June to catch a tarantula in one of my towns and then finally get the gold net(s).
I don't frequent Re-Tail often, but I do like buying hybrids and bush starts, since I'm still lazy to breed/hunt for them myself. I also like foreign exclusives though, I really want throwing beans.
I'm mostly interested in unorderable items and holiday items, etc. I also like to buy hybrid flowers and was buying bush starts, but I have enough for now.
I'm still trying to get the Link costume, I'm a bit lazy as I haven't spent much time earning play coins. Hopefully I'll have a full set of clothes pretty soon. Guess I could use some hybrids too, it's going to look great again soon!
I'd say unorderables myself, I kinda like to achieve other items myself, If I can anyway! And the best thing to do would be to have some Foreign Exclusives as well, some of them are unorderable to begin with and they would suit being in one shop all together