In a way, they're all good, besides the Master Form & Anti Form. I think that Master is to much of a weaker copy of Final Form, quite useless to me. I don't like anti, because you can only attack, really, and you can't even access the pause menu.
Limit (wasn't there, so i checked final)
Final
Valor
Wisdom
Anti
Master
I think Final is really cool, but not very fun since it automatically guards almost every attack. Valor is also cool because it's incredibly FAST, moves like a blood thirsty wolverine, it's outfit design is the best (fleur de lis) and only uses 3 drive bars, so that means two forms in a row.