We are hyper sensitive and always pay attention to who was there before us and make sure to make a point of letting them on before us. However, I would say MOST people aren't like us. I am not a glass half empty person, at all, but it was a little frustrating to have been standing there for 20 minutes and have someone walk up as a bus was arriving and just push up to the front without any regard for people already there (especially when the bus arriving was almost full and we knew their pushing to the front meant we'd be waiting 20 more minutes for another bus)
We are the same way, and people are quite often surprised when we let people who were there before us get on before us. But thats how it can be if there is a horizontal line of people, or just a kinda weird group, depending where the bus stops and where its doors are especially.
Glad there are other people like us out there

I guess we just don't care all that much though, we are still going to get there, and I would rather not add the stress of worrying whether we will get a "good spot" on the bus .... meh.