Sets up both their personalities and the idea behind the poker game. The first time he meets Vesper on the train and the dialogue is just perfect.
The opening black and white shots interspersed with the bathroom fight showing is so much at once: Bond’s intelligence to disable the gun in the office, Bond as a physically powerful brawler, Bond as a cold-hearted killer to earn his 00 status. It’s definitely top 3 Bond movies of all time and my personal number 1.
I personally was absolutely floored by the film. Remember back when they cast Daniel Craig and people were saying they would boycott the film? I actually think that helped the film overall because viewers went in with low expectations.