At some point I played Ragnarok Online all night for a few weeks during summer. It was some +50% experience equipment event that I wasn't about to pass up while I had the time.

Later in the summer, though, I didn't stay up all night to play my games. But I was sick with a flu or something and couldn't go out, so I stayed in and played Radiata Stories from morning to bedtime.

Like people said, I don't really have the time to do any of that anymore.