I think both Robinson and Gregory were quite good from what I've seen, but there's no doubt CR was stiffer and more patrician which probably suited Rick's evolving role on the canvas. It seems Robinson was very popular in the role despite the leading ladies' issues with him, which I think ended up water under the bridge decades later. Pity about CR's later years though.
I've always wanted GH to bring on his son Rick Jr., as sort of another swinging male medical dick at the hospital. Fulfilling some of the archetype the Webber brothers had. But you can't really do that with Ric Lansing (no apparent relation to the other Lansings!) around. You'd have to change the name.
By
Vee ·
from NPH's twitter
ActuallyNPH Eric Braeden is a D-Bag. the actor, (Robin's dad) agreed to a cameo, then last night bailed, saying the part wasn't 'substantial' enough.
about 1 hour ago via Twitter for iPhone
Ausiello's post
http://www.deadline.com/2010/12/neil-patrick-harris-slams-eric-braeden-on-twitter-over-botched-himym-appearance/