What I've noticed most often is engineers, who say they are logical and thinking-first unemotionally, exhibiting:
Anger, frustration, anxiety, exasperation, beligerence, smugness, laughter.
You've almost certainly met engineers who agitatedly tell you how much they are logical, beligerently "reason" with colleagues, or gleefully put down people they regard as soft and emotional.
Those are emotions.
This isn't true of everyone of course. Some people really seem like the emotion chip wasn't fitted. But I have noticed intense emotions in a number of engineers who explicitly describe themselves as being unemotional, logical, and thinking clearly.
It's an interesting blind spot.