My read of Shatner's "reality checks" is of a man who is honestly sick of all the BS - he's literally too old for this shit. Maybe the series meant something to him at the time or maybe it was just a steady job as a leading man. You'd have to go back in time and read his mind to find out. He probably resented it in the 70's when he couldn't get arrested and lived out of his camper doing community theater to pay his alimony. Then he loved it when Star Trek films brought him back to the casting table. Who the hell knows? Humans change lanes without signaling all the time. Shatner is fun to watch at any rate. I wouldn't be a bit surprised if Shatner and Takei get on the phone and plot their feud every Monday.