It used to be that I was the quiet one - I would always hear "It's the quiet ones you have to watch out for!" And when I would open my mouth, something shocking or thought-provoking would come out - so they were right! Uranus&Saturn in Cap in the 1st house.
I've opened up so much in the last 5 years or so. I'm glad to have shed that quiet girl label. Not really sure what makes me stand out now - maybe that I'm the one who's great with kids. I'd rather hang out with little kids and old people rather than all the ages in the middle.
I am trying to work on this one - with my Aries Moon and Aries rising, I am too quick to blurt out a comment without thinking it through. I have been described as "too blunt". Even though I am very sensitive with my own feelings, I often do not come across as a caring person to others.
I can hang out in all types of situations and talk to just about anyone and have a good time.
@Elsa comedic ability is a gift and as I'm sure your son is aware, there are tons of improv courses specifically for developing business and public speaking skills https://www.fm-magazine.com/issues/2018/feb/improv-class-helps-develop-business-skills.html
So whether he stays in engineering or not, his comedic ability can take him far in his career.