This is why I prefer the single seat right in the front of the bus, but don't always get it.

I figure people sit next to me for two reasons, one; I'm sitting near the front and their stop is close by, two; I'm skinny so there's enough room. As opposed to choosing their own seat and having someone else cramp them.

In a full bus I actually opt to sit next to a heavier set passenger, because I know it will make their commute more comfortable, coz I don't take up much space.

Lucky for me us passengers are all regulars so seating is kind if predictable,like on the way home I only have someone next to me on Fridays...