Buster Keaton, for instance, protested to the end of his days that he had no notion of what his admirers were talking about when they spoke, as Andrew Sarris did, of his “cerebral” qualities, or when they detected a pervasive surrealism in his films that - considering the period in which the films were made - virtually placed him in the avant-garde.  "I was just trying to get laughs" was his constant and stubborn answer to questions.  Keaton was, in fact, a brilliant analyst of film, as his dazzling film-within-a-film in Sherlock Jr. indicates: the sequence illustrates basic theories of continuity and cutting more vividly and with greater precision than theorists themselves have ever been able to do.  But the analysis is not in Keaton’s head.  It is in the film.  He went past cerebration and worked only with the thing itself, creating what amounts to theory out of his body, his camera, his fingers, a pair of scissors.  Art is often something done before it is something thought: Keaton’s impulses were not only stronger but more accurate than any verbal formulation he might have chosen to offer for them.  

“Terrio added that Driver sprinkled various Harrison Ford elements throughout his own performance in the film, from the way he points in the face of General Hux, to the way he fires a blaster over his shoulder without looking, and finally the little open-handed shrug he gives the Knights of Ren before their last battle.

"That was actually a very conscious thing that J.J. and Adam talked about," Terrio said. "There could be subtle ways for you to see the ghost of Ben Solo in there somewhere, just his physicality. There are certain things like that in the movie that I see which I'm pretty convinced are Adam showing you what Ben Solo would have looked like before by showing what he inherited from his father."

I will say however that  Han was a drug runner as well. It’s what the whole “Kessel run” thing he talks about making in under 12 parsecs in the Cantina scene. Kessel is where the spice is mined. The reason why Jabba was after Han in ANH is because he had to drop his shipment of spice for Jabba because he was boarded by Imperials.