That is a hard one. I have worked with two T's that I got very dependent on and it never changed for the duration of our work together. Leaving each of them caused significant pain... sending me to another T to get over the previous T. I have also worked with two T's where because of their style dependency never developed. Current T is one where the dependent stuff isn't happening. This has been a huge relief because with both the T's I was dependent on I left feeling like it was my fault and I had done something wrong.
Personally I work better with T's that do not encourage/allow dependency. The grief is just too hard on me otherwise.