Hmm, really pick and go situation after 8 pm to 2 am? I
thought queue is always long at airport.
I used to like Terminal 2, but I had a bad experience last week,
think is on Monday. I reached T2 slightly before midnight, T1
queue was very long, stretching to the junction to T3, so I go to
T2. I think it shows that there are 3 flights arriving at T2
(cannot really remember). The queue was slow, and after
queuing for 1 plus hour, it practically stop moving. I
started to see taxi started to leave the queue and the queue move
is practically based on TD leaving queue, not base on TD getting
pax. Till about 2 am, I was not far from the queue, but it
really not moving, then finally someone told me that there is no
more flights. I go inside the airport to look at the flight
information and indeed, next arriving flight is at 6 am at
T2! So, I finally decided to leave airport.
I had the impression there is always arriving flights every hour
but that experience prove me wrong! Now I roughly browse
through the arrival flight details from
(http://www.changiairport.com/flight-info/flight-status/passenger-arrivals)
before leaving home. Good luck all!
T2 is by far the quietest terminal for inbound arrivals after
midnight.
Three flights on a Monday morning, two from SQ, and one from
Shenzhen Airlines.

The situation at T2 is worsened as arrivals can be at T2 or T3,
and the cycle so happens that most of the morning departures occur
from T3, which otherwise would inbound for T2. So planes park over
at T3 overnight, instead of at T2 and having to tow them across the
bridge for their morning departure.
The two SQ flights, one from BKK and the other from Shanghai
PDG, have tremendous amount of connecting pax. Only a few would
come out to the taxi stand, while the rest stay in the transit area
or head over to the T3 transit area for sleep for their onward
connections which would mostly be the first flight out in the early
morning(mostly to Australia for the BKK and PDG pax, and Europe for
the BKK pax).
Shenzhen Airlines uses a 737 to SIN, and carries only at most
150 pax per flight, and thus the lack of traffic.