That could be it Carolyn. I've had some interesting individuals in the past, and not just cockatiels. I had a canary that sang when he heard finches, or other cockatiels. He didn't sing much when I played recordings of his own kind singing, though.
I had a cockatiel once that did a form of beak banging... He banged his beak on the bars, but rather than just hitting the bars, he actually grabbed onto bars with his beak and do it (I might have talked about him in my introductory thread. His name was Pecky). Basically, he'd practically vibrate the cage doing it, and it sounded like one of those cartoon woodpeckers that pecked unrealistically fast. lol
Indeed he is cute, Dianne.
I couldn't help but giggle at his attempt to woo the conure (especially when there was a female cockatiel that showed up later in the video).