I find it most useful for them to spill it all out, reveal as much about themselves as possible so I know who not to go to. For example, one therapist wrote (paraphrasing): "I continually derive great satisfaction from being the one you turn to for support..."

That statement could be interpreted more ways than one, but in context of the rest of the site content, the overall takeaway message from all that she wrote was that therapy was all about her.

Better to have a way to screen them as opposed to finding out who they are after establishing and investing in them.

My current therapist has a therapy profile/ad that really appealed to me; concepts that I still find captivating even years after we met.