What exactly about the list was making you angry? Were you angry about the things on the list? Was the mere process of doing it making you mad?

Anger is also a function of autonomy in therapy. It is progress; the abilitiy to take an emotional stance that is different from T. Are you afraid at all of transference? Meaning... being afraid that if you bring the anger into session it will be transferred onto him?

I really like that he gave you that choice. Choosing to work on it is a huge step in the function of autonomy in itself.