People often talk of “character arcs.”  Arcs a fancy byword for
“character change.”  Think of your hero as a work in progress.
 Protagonist 1.0 might be cool and handsome, but isn’t in touch
with his feminine side/greedy/can’t skateboard.  Odds are that a
series of amusing setpieces will turn him into Protagonist v2.0
who’s very in touch with his feminine side/not greedy/a good
skater.  Let me illustrate with a bad pitch:  A badass comes to
a strange town.  He kicks a bunch of ass.  Then he kicks more
ass.  Then he fights the villain in a big showdown in a burning
building.  Then he leaves town with the girl.  Not much of a
tale.  If I were reading and covering this, I’d write something
like, “The protagonist lacks a dramatic arc.  He defeats the bad
guys with skills and tools he had at the beginning.”  Stories
are about change, about giving characters Freudian backstories
and excuses, and then reconciling them in the course of the
drama.  This shouldn’t be too obvious, but still, you want an
audience member