So I don't know where to really rate this as the games have several different types and I played paradox specifically.
I'm going to list some things that make this stand of any RPG i've ever seen:
-The system of both classes and races
-All enemies can be allies. They can even give you items mid game and you can recruit them shin megami tensei + friend system style.
-The number of classes is so huge I believe I haven't seen any as big ever.
-The number of races is so huge I believe I haven't seen any as big ever.
-Every class and race has 3 evolutions, and some evolutions are combinations of races and classes which makes the number grow to an insane degree.

Now for the more common things:
-Good monster girls designs and terrible monster girl designs (I would erase the dog girl from the game given the chance).
-Quite common depth in combat, very surprirsingly shallow if compared to the insane build depth.
-Questlines and story are nice, not extraordinary, the world building isn't neither, but nice.

Finally, it's a porn game, but you can just play it without the porn. You may see some monster pussy and booba but it's inoffensive honestly.