Things very wise and/or experienced VCs/founders have told me which I'm sure they wouldn't publish, which I have valued very much:
* If you don't look like a stereotypical founder, you won't follow the stereotypical path; that's not a problem, it's just a difference. Pursue your dream from first principles.
* The difference between flirting and friendly is perception, not purpose - don't worry about seeming aloof and don't take it the wrong way when pursued (to a point).
* Never come out until/unless absolutely necessary. Especially not to gay men.
* Absolutely don't talk about your young children with investors, especially if the investor has children of their own.
* The other side of not being perceived as a highly technical co-founder (which I am) because of my gender/appearance is that I'm more easily seen as a people person or product owner (which I'm very much not). It's ok to take advantage of that.
* I don't look enough like a founder to get angel/seed; I should make my money as a co-founder then self-fund through series-A, which tends to work out better regardless.
* Never, ever speak at a conference/on a panel about diversity. Your online identity defines your future opportunities, and the diversity racket is awfully small.
(Many more too specific or nuanced to include here.)