Driving through the night has always felt rather dreamlike to me. Reality seems to condense to just the inside of the car, as the rest of the world is silently consumed by the darkness. Bird of Passage perfectly captures this feeling; the world outside is a mystery, lost in the night, and I wouldn't know the game was set in Tokyo if it wasn't brought up in conversations. The simplistic soundtrack helps too, using the inclusion of rainfall, to create a meditative atmosphere.
As you move from taxi to taxi, you'll engage in conversations with the drivers. Some drivers are happy to talk to you, while others prefer to sit in silence. These talks are navigated by choosing from a selection of dialogue options, which can lead to you discussing anything from plants to the history of Tokyo. Oddly none of the taxi drivers wants to talk about how their passenger has a giant eye for a head.
There are multiple outcomes for each conversation. Talking in a silent taxi may lead to the driver asking you to leave and I once accidentally caused an argument, leading to the journey in that cab ending early. As the dialogue flows, you'll also learn more about the mysterious passenger and the past that even he can't seem to make sense of.