Andrew, this is not so much for your original question, and I'm a little late joining in on this thread, but I agree with what Rob said in the beginning, once I discovered what made it click I couldn't get enough. I just kept having bad sex with one partner after another until something finally clicked and I realized I was a top. It took many years and a lot of evolving.
Now, I am so, so lucky that I have a partner that totally gets it, encourages me, never forgets to call me he and him, loves penetration every which way, and treats me like a total guy, which does wonders for one's confidence and makes the sex really hot, because I can really be comfortable and express myself completely. I often cry/tear up because it FINALLY is right, and I'm sorry, but IMHO good sex is just one of God's gifts to the world!
On a personal note, I DO find it aggravating to have to switch from my STP to a hard packer when the mood strikes, but until I get one of those $700 dollar deals that does the whole job, I will have to be content...and I am, it's totally worth it!
I appreciate how everyone is so honest when these sensitive topics come up, that's how we learn and help each other. Thanks, guys.