From one of the Howes articles--seems applicable to me:
"Beyond specialty, there are also times when interpersonal issues become a barrier to the therapy. In therapy, as in all close relationships, problems with trust, communication, and empathy could render therapy an obstacle rather than a conduit to healing."
and
"One point to consider is whether the obstacle is central to your issues or not...But if you have a fear of heights and your interpersonal issues with the therapist are getting in the way, leaving therapy could be a good option."