I completely agree. The robot novels would be much easier stories to adapt with little deviation from the novels. It's been decades since I've read the whole canon of Asimov robot and Foundation novels, but I recall the Foundation novels being very dry and academic - I loved them, but they're just not high adventure action stories that translate well to the screen.
You can start with the robots, and then move to the Foundation story with the robots from the beginning, because that's how Asimov revised his own Foundation story.
