Graces has the best combat by a mile, and imo some of the best party interaction. The skits are awesome.
Honestly, the fact no one can agree tells you all you need to know. Most of them have something good and something bad. Vesperia's story struggles from multiple writers. Abyss has a love him or hate him protagonist. Symphonia imo does not feel very good to play nowadays. People hate Graces' story. The list goes on.
Just dont' play tempest, other than that you might as well spin a wheel.
I'm a greener egg than the eggs from dr. seuss