It seems to be the case that after a serious relationship ends, I discover that certain aspects of it are things I do not want in any future relationships. Some of these are senseless allergies (omg no more Alex Chilton fans!!!*) but others, I think, are legitimate discoveries. It's hard to know how living with someone who does x or y or believes z will turn out. Sometimes I was blind to signs that I can now recognize, and others times, it just requires playing the experience out all the way to find out how it goes.
One thing I learned from my relationship with Ed that I don't want anymore is a little bit subtle, but important. One of the very noticeable features of Ed early on was that he was very emotionally literate (which I really appreciated, and continue to think is cool) and wanted to understand in minute detail what I was thinking and feeling about various aspects of the relationship. He didn't feel safe if he didn't understand my exact feelings.
This went both ways. If Ed found a feeling in himself that he thought might be a deal-breaker or bad news for me, he always told me about it. He was very open with me (which is a good thing, in general) and scrupulously honest, to the best of his ability.
All of this is why "radical honesty" was a tenet of our relationship.
I'm not against radical honesty. I think as an experiment it's fun. In fact, as long as you remember that it's called "radical" for a reason, it's all good.
But I don't want to be in another relationship with someone for whom that is of prime importance. I want my future partners to trust me to manage my own thoughts and feelings. I want them to trust that I'll tell them what's important, but be content with my being somewhat of a black box. I want to be with someone who doesn't worry about it that much, and/or who just figures me out as we go along. And I want to be with someone who manages his or her own inner thoughts and emotions as well, sharing as appropriate or desired but sometimes holding things back that are counterproductive to share.
(* not actually on my list)