It would be very interesting to add information about when you were working with advisors/mentors and when you were purely working on your own.
I haven't had nearly as many at-bats as you have, but enough to know that I personally can't get very far on my own without an experienced voice guiding me past a lot of dumb ideas.
At learnection I had a board of my uncle and another VC guy, who were helpful but I didn't use them at all to the degree I should have. Other than that, no real advisors/mentors.
For Zoofoo, Email client, Yahoo store thing, Namesdatabase & Kangadoo I worked with the same partner. The "Wall" (never launched) was with a different partner. And nth Club was with another partner. The rest is/was solo.
I haven't had nearly as many at-bats as you have, but enough to know that I personally can't get very far on my own without an experienced voice guiding me past a lot of dumb ideas.