I also LOVE an honest reaction from a therapist. I am then able to know where I stand and I think they're dealing with me on a "real" basis. And we can go from there...
I get creeped out when I think they're kind of sanitizing things for me..or speaking in a fake "calm" and "calming" voice and just generally treating me like i am unable to deal....as if I am fragile.
I would rather hear the whole truth and have a meltdown if I cannot handle it, than have them "handle" me. Of course, I do have the occasional melt-down.