Here is a list from another therapy site(this site has a lot of attachment/trauma focus so the list sort of has that slant):
http://psychcafe.ca/eve/forums/a/tpc...m/961008194001

and I think the psychology today site has a blogger with a list too.

I read a book by a guy (may have been Wallin) who was snotty about a client who came in and sort of interviewed him. He seemed indignant and put out at the idea. So I would add to my list to avoid any therapist who did not realize they are being interviewed for a job and take offense at it. But that is my thing, and is of course not one of the hot buttons for everyone.