Billy can be annoying when he’s interrupting but I think once I saw a couple of these and started to understand why he interrupts or why he can be pushy with getting a certain answer from a guest, they were easier to tolerate. I still probably said “STFU!” 10x during the Vai interview, but I get the idea that Billy has both felt he’s been misunderstood and actually has been misunderstood quite a bit over the years, so when he’s really trying to connect to someone or connect an idea to a question, he’s a bit over the top in ensuring it happens. His drummer is probably the only person on the planet that ever tells him to shut up.
He’s more intelligent than I ever gave him credit for, some of the insight he’s let out during those interviews is telling of that, particularly the Gene Simmons one where it almost seemed like Gene would throw him a bone every now and then by giving him an intelligent answer instead of “For money, duh” over and over. Both intelligent guys, but I get the idea Gene likes keeping his intelligence under wraps as where Billy is always looking for a chance to show people how intelligent he is.