Mojo, I could have written this post verbatim. Interesting the similarities in our situations!
Sounds like everything is going really well for you; I'm loving the updates!
In regards to the being on top, I share the same feelings. I like it and it feels good, but H has only come from that position once in all the years we've done it. I don't think it provides the intense thrusting that he prefers and I tire out after about 15 minutes of it. So my confidence re: this position is very, very low. The funny thing is...he asks for this position all the time and I usually try to get out of it! How lame is that. The reason is that I end up thinking that, while he likes it, he couldn't like it THAT much since his verbal and physical clues are not indicating that. I think what it does is give him some eye candy to use for later in the session when he is in control and can do it as fast as he likes. Then he can think back to what I looked like and really enjoy it. And there is NOTHING wrong with this! I am not sure what it is inside my mind that balks at this. But you are not only confronting yourself today, you are forcing me to think about issues that I need to address also.