I used to work shifts and still do quite a bit of overnight work on deployments and there have been alot of them lately. Mine was 12 hour shifts. Four Nights, four off, four days, four off.
I'm also prone to play Tanks until stupidly late, particularly if I'm on a winning run. Finished with 6 and a loss the other night - was well after 02:00 when I went to bed.