There is no look of intelligence.
I view many of the longer term posters here, even some of the hacks, as having a higher than average intelligence and a few having a much higher than average intelligence. Of course, only so much can be gleaned from discourse on a forum, so take it with a grain of salt ...
In real life, intelligence can be found in all age ranges, educational levels, income levels, and personal styles.
Some of the most intelligent people around me:
My mom, confirmed IQ of 167, dresses down, has a high school education, has been the finance VP or more than one midsized company (5k+ employees) and retired in her 50s and is now a daytrader, small l libertarian
Me, confirmed IQ in the 150s (I got a battery of testing when I was a child and again I had a psych review a few years back during a depressive episode, I dress nicely most of the time, I am not as successful as my mom (but I have 20 years to get there :mrgreen
, total social misfit as a child, pretty much a natural leader and manager in my adult life, small p progressive
My son, IQ in the low 160s, pretty much a high functioning autistic
My friend George, unknown IQ but extremely intelligent, was a VP in his late 50s, was laid off when the company went under, makes his living as a senior process engineer. politically, I suspect he is a fascist.
Another friend, Mike, probably he most intelligent person I know, pretty much useless, is an artist (his art sucks) and has no motivation to do anything with his life. doesn't care about politics
The list goes on and on. Point being, all of us are different in all sorts of way. There really are no common themes.