Do us a favor, next time don't post sooo many pictures to judge at once. LOL (JK)
What male are you pairing them with?
I don't like the reds. But if I must choose, I would choose the second red. Nor do I like the blue-white (nice body but not so good fins)
The black is OK but she has few rays and very rounded caudal. She also has a poor anal fin. You need to pair her to an excessive rayed male with pointed edges.
The first blue I like best out of all the females.
The next blue-whites have too few rays, poor general fins.
The steel blue drgn seems to have poor dorsal (she's not flaring) but her caudal looks great.
The black DT's body is quite long, dorsal could be better (also not flaring).
I love the betta in the background of the last picture. The blue drgn could have better dorsal and anal.