|My runner-up shot|
It's not until after Travis has gone after, gotten, and lost Betsy that the film begins to darken to the point that he is shooting up a brothel and murdering three people.
After recovering from the serious injuries of that encounter, Travis is wrongfully labeled a hero and returns to his taxi driving, leading to my best shot: Betsy, reappearing, almost like a beacon of light in the darkness, as if offering him a way back toward the light.
|My Best Shot|
The movie ends immediately after he drives away from her, so it's unlikely he takes it.