silverwheel said:
But I must admit that it is a little strange that R2 displays much more fear at Jabba's, when it knew that Luke wasn't really donating them and that Luke had a plan, than on Dagobah, when R2 really had no idea what to expect.
I think being in the dungeon and seeing the droid graveyard and droids being tortured may have spooked him. Even though Luke wasn't really donating them, the droids could have still been disintegrated for any reason. Surely R2 would have been if he didn't learn some respect.