Just thinking back through my list and what made my top 3, I'm thinking I really need to see Dunkirk. I tend to really like dramatic films based on actual historical events or figures, whether they are historical fiction, documentaries, semi-biographies, or what have you. If Dunkirk is well done, it could easily make my top 3. But it depends. As a counterexample, I didn't think Pearl Harbor was all that great when it came out years ago. Not that there was anything bad about it. But it just didn't really bring anything to the table in a way that I felt was particularly compelling, other than the cinematography. Contrast that with historical fiction films that are some of my favorites, like Braveheart, Gladiator, Last of the Mohicans, and The Patriot.