TehCookie said:
Minecraft, I played til dawn and it took me a minute to realize that the sun coming up wasn't square.
This. I made the massive mistake of buying Minecraft at 5pm the day before my Psychological Research Methods exam to have something to do (I have a habit of taking the last day before exams free from studying, as it does more bad than good for me to study the day before). Next thing I knew it was 5am and I got 1 hour of sleep. Still got a B though, which is great when I was expecting a C at best.
I also have a real bad habit of this happening in racing games, lastly Forza 4, and before that Racedriver Grid.
But definitely the worst was World of Warcraft. While it never took over my life, there was a period in the autumn of 2005 when I could easily pass the time from after school until 2-3am playing without noticing it was way past a sane persons bedtime. Still took me over a year to reach level 60 on my first char. Don't regret it though, had lots of fun with it, and still go back and try it sometimes, although it's been a couple years now.. Maybe I'll try out MoP after christmas.
Captcha: raspberry tart. And now I'm hungry..