I have to say I prefer short-finned bettas over long finned ones, after what happened with Octo's fins. However, if they don't have a nervous (or spastic, in Octo's case) personality, I do think HMs, Deltas, and DTs have a place in betta society.
I don't know why I just mentioned betta society. It's been a long week.
I have 4 VTs and they are the most sociable fish I have :) I love them sooooo much...sure I love the look of doubletails but if I see a beautiful fish with a great personality im not going to be biased on tail type