C'mon, R2D2 had what a lot of these robots lack --
Seriously, he did what he wanted, and to hell with anyone else. C3PO couldn't stop him. Luke couldn't stop him.
Even Yoda got his ass zapped when he got out of line. Nobody -- robot or not -- gets away with shit around Yoda. He's badass. But R2D2 was like, "Beep boop... Put that damn breadstick down, muppet!" *zap* And how'd Yoda retaliate? He hit back with a stick, which R2 coolly ignored.
Wrinkly green bitch.