So I took the day off and went to see Back to the Future at the theater. It was phenomenal and I had the whole place to myself.
And I'm still noticing little things here and there. This go round I noticed...
When Marty meets up with Doc at the mall he starts to ask about his hazmat suit, "Hey Doc, is that a Devo‐" Doc: "Not now!" I don't know why but I never caught the Devo reference before.
There's a lot of repeated lines from past to present. The one that I never previously caught is when Marty returns and is telling his parents how great they look. "Mom, you look so thin!" Which is what he previously told her in 1955 when he is struggling to not tell her that she looks hot.
Finally, the greatest insight I had was surrounding Marty telling Doc about his dad laying out Biff and that he had previously never never hit anyone. Doc says, "He's never done that before?" (Punched someone.) Then he has a concerned look for a moment. We all know things turn out better for the family in the present but the real implication is that Marty becomes too confident (assertive) in future. Remember, he is actually afraid of rejection of his demo tape in the beginning, an inherited trait from his dad.
So in 1955 Marty stands up to Biff in the school cafeteria and Biff calls him chicken but Marty isn't triggered and doesn't really respond. He is already sticking up for his mom at that point anyway. But in the sequels, he can't walk away from the taunt and always replies that "Nobody calls me chicken[or yellow]!" And it always gets him in trouble (though he learns his lesson for a moment at the end of part II and avoids the accident resulting from the race with Needles).
So yeah, still a 10.