I always, if I can manage it, park my buggy in the buggy space with my child facing out. This seems like an obviously the right thing to do to me (and of course I am the definitive source of what is right). I am daily judgy surprised at how many people don't do this and park their buggy with the child facing the wall.
I just don't get it. Why would you shove your child into a space with their nose a few inches from a piece of grubby wall where they're too low down to even look out of the window when you could just as easily reverse them in so they can look at you, all the people getting on and off the bus and the view from the opposite window?
Okay, there are times when the bus is too full to manoeuver the buggy backwards, or you want the child to sleep and not be distracted, but the majority of the time it just seems plain mean to banish them with their faces to the wall.
Apart from anything else, it's brilliant having them facing outwards because old ladies and broody teenaged girls entertain the child for the whole journey while you read Heat compile educational flashcards.