Originally Posted by
UtilityGuy
Also I prefer the window and the starboard side generally.
Note that on the 737-900, as well as the 737-900ER and 737-MAX9, the starboard side has noticeably worse seat pitch in Main after row 17:
https://www.flyertalk.com/forum/33580906-post27.html
So if seat pitch is a concern and you get stuck in non-PC, non-exit Main, your best bet is the port side in rows 18-32.