My therapist is also very restrained. We've worked together for 10 years and she's the best therapist I've ever had (a few bumps in the road not withstanding). I just know that if I tell a funny story she's not likely to get it or if I want a strong reaction I'm not going to get that either. She is the calmest person I know, except for my psychiatrist. Nothing phases either of them. That suites me just fine.