Among the comments today was one that said he was, for a time, a little bitter about being type-cast after his three years on the original series. Finally, someone told him to quit complaining and consider himself lucky to have had the opportunity to play a character that was still known globally for a series that only lasted three years back in the 60s. He said once he accepted that, he went with the flow and had a very happy life...
Not a bad epitaph.