I would have to agree with the Leghorns also. My Exchequer is a freak! She chases all the other chickens out of the coop just so she can go lay her egg. As if she couldn't just walk over there and go lay it. None of the others would have even cared. She won't let us near her. Once you catch her, she's not too bad, but its almost not worth the effort.
I only have 1 RIR, from McMurray. She's been one of our favorites, but she too is standoffish. Unless of course you have treats, then she is there jumping 3 ft off the ground to snag stuff out of your hand.