mine would be that I could find 1 green, 1 yellow & 1 black female somewhere, I've tried like 11 aquariums & they don't have any, just the typical colours, blue, purple, brown, pink or white which I've got. Very rare to find I know, but why do they keep the same typical ones, there must be loads more out there!!!!!....for ME!!!! hehe!
Also that all males could live together in the same tank & get on, then I'd set up a huge sorority filling one side of my living room wall with loads of different ones.
That would be my betta wishes.............