Some defense of BTTF 2 since it was on my list.
I don't get the hate. This movie picks up right where the first movie left off and keeps that pace up throughout. The movie seamlessly covers 4 different time periods which is not an easy task to do so convincingly and does so without rewriting or affecting the original in any meaningful way. This point also brings up the continued stellar acting of the main cast. Lea Thompson had to play 3 different ages of herself and Biff had to play 4, including a grandchild. The chemistry between Michael J. Fox and Christopher Lloyd remains throughout and they continued to be one of the best duos in 80s movie history.
Also, what's a great blockbuster without some sort of iconic social/cultural impact, in this case it came in the form of hoverboards and self-tying shoes! What kid didn't pretend their skateboard was a hoverboard and we're still to this day waiting for the real deal. And when we talk about movies that tried to predict the future, this one is always near the top of the list.
If that's not enough to rank this movie at the backend of a top 200 80s movies, I don't know what is.