Most people i see on the train are either playing games, listening to music, watching a movie, reading an article via phone, or texting chatting. I mostly do listening to music and texting / chatting (mainly for the purposes of urgent things needed to attend to).
My point is... yeah. the more...
I play alot of casual games. But sometimes, very good casual games become too addicting.
I currently play - Brave Frontier, Deemo, Chain Chronicles, Final Fantasy Recordkeeper, Marvel Future Fights, Hearthstone. etc.