I agree with stopdog completely about Ts getting their own therapy. Even when they do it as a requirement of the course, (according to my T) some of them are just going through the motions and not properly engaged in exploring aspects of themselves, which makes the process redundant really.
Luckily my T has been through extensive therapy and ongoing supervision and seems to have a good idea about his own blindspots so he can readily recognise when something emerges in the relationship that has its basis in his 'stuff' (such as the paranoia incident a couple of months ago).
On other subjects he generally has a clue, but always emphasises that I have more of a clue about me than he does, so he can only offer suggestions and see what fits. He's not the arrogant type.