[MENTION=659374]Kacee[/MENTION], for me, it was more about timing than anything else.
I wanted to leave Thursday night and get in Saturday morning.
The NH itinerary they booked me on departs Friday morning and would've gotten me into SGN in Saturday evening. NH has an evening flight to HND that could connect to HAN, but I don't know if they would've done that for me (even if they could, I needed to be in SGN).
SQ, OZ, and BR flights allow me to leave in the evening and get into Asia in the morning.