@EvilKing... exactly, its so easy to picture the rats arm wrestling, dancing and playing cards!
I think that some of the rats in GOAT might be neutral or even good. It would be funny to see them arguing, smoking, snoozing, belching, drinking, gambling, eating rudely, preening themselves comically in a mirror, scratching and sniffing their armpits, stretching, practicing kung fu moves, looking at their weapons, playing the harmonica, singing lustily, squatting on their haunches, reading a book, lashing their tail impatiently, raising their head and sniffing the air if they are suspicious.
As to the frogs, I imagine them as being a bit more civilized than the rats... though doing some things that are similar to rats. Unfortunately they are unlikely to go surfing
I don't know much about crabs, though I guess they'd graze while eating, wave their claws as they click at each other, and walk sideways when they are relaxed.