This is what I remember every portrait of an author or academic being like on the backs of all those used books I used to read from the 60s, 70s, and 80s.

And, a variation:

There was also the leaning back in chair, sports jacket wide open with a big gut and wild hair, waving hands discussing something important with someone off camera. Maybe even with a cigarette or, if you were really lucky, a pipe they were pointing with.