The first episode of a good shonen will typically have the main character SAY what the WANT and SHOW what they NEED.
Of course, a show that does that can still be bad and a show that doesn't do that can still be great.
The true sign of greatness is when the writer has intent and understands what their story decisions mean for the narrative.
But for some catchy advice the first post can be helpful for conceptualizing a new story.