I don't think you can compare them. I mean I'd say ROTS in a heartbeat...but its in a totally different league than ESB...which is my other favorite. ROTS stands on its own; it can't compare with the OT and is a different style than 1 and 2...it is just simply shock and awe.
They're are all awesome! It's really hard to pick one and say it was the best. Each one has its good points that makes each one unique.
