My sessions used to be more lighthearted and then they got serious. Instead of chit chat in the beginning, I would just dive right in afraid I wouldn't have enough time. A few times I told my T. that she doesn't seem to laugh/cut up as much and she reminded me that usually therapy is serious.

I think it just depends on the topic I"m talking about. Sometimes she teases me and usually it's when she's pointing something out. Recently she asked me why my brother had been in therapy because he had the same issues - trust/abandonment, etc. I told her I didn't know and then I said oh yes it was because of his mom. We have different mothers. She just smiled at me and looked a long time. Until I said oh, ok we have the same issues. Hmmm

And, sometimes I want the humor and she's serious and it bugs me. Perhaps it also depends on who went before me and what her day is like. If she's too serious, I point it out in hopes of lightening her up.