Amount of study and training could be an issue. Do they understand the effects your experiences had on you, how they changed or stunted your growth, and then how to create a safe place for you to heal in? Or however you or they might describe the job ahead. I would worry about their depth, for you. About being able to contain you. (So maybe your so-called negative list isnt such a bad idea, as it isnt really just about the transition to a new t, but about betrayal in general.)