An iPad loaded with:
- TV shows from Amazon Prime, Showtime and/or Apple - often prefer to start a one how TV show at various times during a flight rather than a longer movie.
- A couple movies - usually movies I didn't want to pay $12+ to see in a theater, documentaries or older movies I want see again
- Podcasts - to "rest my eyes"
- Lots of music
- A couple books
- Some games
Basically variety, so I have a selection of entertainment to get me through long flights.
I will generally check the IFE if one is available for anything I might want to watch too.