Why do masochistic and submissive men (and women) write more about their experiences and feelings that dominant women and men and sadists?
While this doesn’t seem to be quite the web truism that it once was, clearly more bottoms blog and post on forums than to tops. Is there some hidden psychological factor at work?

That’s a good question. I’ve noticed this, too.
I could give you my thoughts on this, but that would require making myself vulnerable. Lemme see if I can muster the time and energy to assemble something worthy of your site Richard.
Thanks for always making us think.
MWK
I don’t know what other people’s experiences are like, but I find that of the BDSM people I meet in person, by far the highest percentage tend to be bottoms or switches. I suppose one possible reason more bottoms blog than tops is that there may proportionally be fewer tops to blog.
I am very verbal because this slut whore likes to flirt and tease to make the top jealous and then I like to be beaten for being a slut!
That’s why I’m here today. I’m thankfully feminized to the point that I love to talk, tease and flirt. I wasn’t before, but now I seem attractive to all sorts of women and I love it. It’s a natural by product of being sub, I love making these posts and hoping a good, smart domme will notice me. But I love to be verbal and even poetic.