My wife says the same about me. Especially when I get into meaningfull discussion.  I don't have coversation if I don't think there is a point being made.  No small talk. No chit chat.  Only platitudes and terms of endearment.  They say what you mean.  High signal and maximum efficiency. 

I used to enjoy telling jokes when I was younger.  Not anymore.

The wife and kids still love and adore me so it can't be too bad.