Astrid was an ultimate dream cham, but I lost the bidding during the initial auction. I basically gave up on her, but one day a friend of mine messaged me and said she was ufs. So I sold like 3 chams to be able to afford her xD It was totally worth it and I absolutely adore her. She's never leaving me Q.Q
Yeshua was also a dream cham. I didn't really think I'd ever get him, and I was just content to have him in my fave folder to look at, and then I saw him UFT and offered, and my offer was accepted!
Besides that, the only other "dream" designs I own are Luxxe who is basically just a design I've always really liked. I don't really have much of a character for him, but I hope someday I can get an anthro form for him and put him in with my other anthros. I also have Milky White (Name in progress). He's less a specific dream and more of just a dream to own one of the species. I'm super happy to have gotten him, though, because he's absolutely gorgeous, and he's basically a G1 gutmutt since his design is from the old species ref.