Which Usagi Storys are full length stories and not short, and which ones are the best.

I've read/own :

Book. 2 Samurai
Book. 4 dragon bellow conspiracy
Book. 6 Circles

and liked them all I just dont want a collection of short stories.

That was the samurai bunny from the ninja turtles, right?

Yup. Well, he's the same bunny you're thinking of anyway. I'm not sure whether he actually started out in the turtles books or if he had his own book first. I think he had his own book first.

I don't know anymore than that though. I always meant to check 'em out, but never did. c'est la vie.

He didn't start out in the TMNT. It's a seperate comic entity on its own.

Hard to recc one. I think they're all equally good.

To be honest, since it has an overall story arc to it, I would just get whatever you don't have. That's a lousy answer, sorry.

Grasscutter I & II