Eliezer, in the ones I’ve seen so far I don’t think you comes across very well. In particular you tend to ignore the point (or substance) of your partner’s arguments which makes you look evasive or inattentive. There is also a fine line for viewers between confidence and arrogant pomposity and you often come across on the wrong side of that line. Hopefully this desire of yours to keep doing it reflects a commitment to improving, in which case keep at it. Perhaps asking a number of neutral parties about specifics would help you train for it… if you’re willing to accept that you are being watched by human beings and that the audience reacts differently to different styles of presentation (it seems you do care to some extent; for example you wear clothing and appear well groomed during the conversations).
As others have suggested, trying to resolve or at least continue your debate with Robin Hanson would be interesting. A conversation with Ben Goertzel about AI safety issues and research protocols would be worthwhile to me but might not engage a broad audience. Most exciting would be Dale Carrico (http://amormundi.blogspot.com).
People on this site love to use fiction to illustrate their points, and a “biomoderate singularity managed by a superintelligent singleton” is very novel-friendly, so that’s something!