I don't really favor my bettas over each other. Each one is to his or her own.
Janey has her huge tummy.
Phantom Menace likes to peek out of his sunken ship ornament, and makes bubble nests 2-3 inches high.
Ares always greets me, swimming back and forth excitedly.
Lovelace is rather shy, but does peer at you from behind his fabric plants.
Peaches is a fiery little bugger, who eats a lot.
Double O' Splenden likes to show off, and thinks he should be fed more (not a chance)
Mickey is temperamental, and finally stopped biting his lovely fins.
Charlie stopped biting his fins once he was in a 1 gallon tank... And has calmed down a lot more too.
I can't favor them. For tailtypes though.... I do not really like halfmoons. They may be in demand, but they suck. The fins are too heavy... the fish don't like it. I want to bring the length down a lot more in an HMPK x HM line...