For games in general, I have two benefits. The first is I have life-long insomnia, not having slept a full night in over 30 years. So I often play overnight. The second is my wife likes watching me play games. We happen to think Master Chief is a compelling character, on a side note.
my wife doesn't complain, so i play most of the time.... hell, the xbox is on most of the time i'm home, If i son't work the following day, I play from either 12am to 3am or if i have the kids to take to school the following day it's 10:30 pm to 12 or 1.... I really don't need that much sleep.
one time i had to take car of something for the kids and was gone 2 minutes, she filled in and got a couple of kills. She does game but not first person shooter... she's a more zelda oriented girl and likes Myst ALOT