I know all of SMRT perm fleets and majority of
SBST perm fleets (especially of DD perms, MK4 perms esp.
HG & BN side, KUB perms esp. AM/BR and BN side I do
not really know them well) already.
Yishun (checking of YIBP roster) and Woodlands (my study place)
I frequently go there. But occassionally, I will go Tampines, Pasir
Ris to visit my friends or CNY stuff.
Be safe for those MK4, KUB statuses I do really well, I will
check sgwiki (even though this will take more time to do so)
The roster there at YIBP always like to throw buses around on
different slots.
For me, Majority SMRT, and minority SBST(provided I see
'unfamiliar figures on that service)