There's
more than just buses or "cameos" (a permanent service bus deployed
on another service) in this hobby.
There are the memories, meeting bus captains and their experiences,
the frontline staff's stories, lineages and design, technical
details of how buses work, appreciation of how and why some types
of buses are designed and our own memories of the buds that are on
the road.
Info from BIS most popular and trusted official page on Singapore Buses~
One does not simply mention BIS on his/her/it post 