Léon (The Professional)

This has been one of my favourite films since I saw it for the first (and before this, only) time in high school, and returning to it now, I like it for what I reckon are pretty much the same reasons why it made such an impression back then, more than a decade ago: Gary Oldman, Jean Reno, a young Natalie Portman (although of course then that was all I knew her from), constant action (not always of the gunplay variety), continual style, the relationship between the two leads, the way it draws one in right from the start, the pathos and climactic explosiveness of the ending.