I voted Clockers cause that shyt was a personal classic to me. Everything about it just hit me hard. Plus everyone in the movie reminded me of people I actually knew and even the scenes in the movie reminded me of things i had seen, it just seemed so real to me. The scene where the mother was cussing out Mekhi Phipe cause the influence he had on her son just resonated with me on a deep level.
really Spike has so many good ones though its very hard to pick. Top 5 to me,
1. Clockers
2. Do The Right Thing
3. Malcolm X
4. Mo Better Blues
5. Crooklyn