Lets see...last time I did it I was reading MARS, that series is hard to stop once you start it...I could see sunlight coming through my window when I finished the last volume...I actually do it pretty often cause of my random work schedule. Most common culprits are Mahou Sensei Negima, Anatolia Story (Red River), Skip Beat, Tokyo Crazy Paradise...those are some that I find really hard to stop reading once I start...they're also all fairly long.
Most common reason for all nighters is usually I get caught up reading some Fanfic and don't feel like stopping...especially since some of those get really long.
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