Subconscious Bus Sychology

So when you are part of a whole bunch of people at the bus interchange getting onto an empty bus... where do you sit? What are your mental processes like? What determines your choice of action?

For most people, it'd probably be something like
1. which doubleseat doesn't already have someone sitting in it
2. Which seat is nearest/furthest from that damn TV screen (depending on your inclinations)

and then what?
3. Which seat is nearest the door for easy dismounting so you don't have to totter around and stand in a moving bus for a while before getting off?

or
3. which seat is furthest from the door so you don't have your climate controlled aircon interrupted rudely by warm gusts of air from the open door?

what if all the seats already have one person sitting on them and you have to choose who to sit next do? How do you choose?
So i've decided to start observing seating patterns on the trip back from Toa Payoh interchange to my house as the bus fills up. Do people tend to sit next to others of their own gender? or opposite gender? or race? or just, well, next to the smallest person they can find who takes up the least space? Or does it not matter who's sitting there? which seats in the bus fill up first? hmmmmmmmm.