I thought of a few more:
You are going to have a whole new vocabulary example: boundaries, dysfunctional, mindfulness, containment, coping skills ect.
You really start to notice how sick other people are but they think you are the sick one even though you are the one getting healthy. (talking about family members who haven't been in therapy)
That having a person listen to you can feel so good yet this same person can cause you so much grief.

Great post by the way. Really made me think.