lacking a sense of humor

My 16 year old says that I lack a sense of humor. That "everything" pisses me off and that I don't recognize playful banter.

Really???

Could it be that he is right.  I mean, other people, outside my family that is, recognize me for the witty and humorous gal that I imagine myself to be. So is it possible, that I am that controlling and uptight in the house, in  private, that he could be right.  

Could it be underneath what others see as strong, confident independent women really lies an insecure OCD bitch.  Probably a combination of the two.

Could it be that I am really a combination of the two??  And would a more relaxed, bantering mom relate better, make them listen more or lesson my stress level. Maybe. 

Or it could just be that he is a teenager and will take any contrary stand to me. One thing I am sure of, if he dislikes me or is frustrated by me, then I must be doing my job.