Well, Trawangan is more famous for night parties, awesome crowds, good happening resorts and McDonald :) Gili Air if you want to spend your time at a place that is quiet, where you want to sit in a club with singers singing the melody on the mic and a beer in your hand. In short not happening but quiet and calm. The memo is again quiet and is almost like Gili air so it's totally dependent on your choice to select between Meno or Air : ). Day time you will be doing water sports around all these 3 islands so we intended to talk about night :)