Not being able to sleep cause you're excited about something.

Many, many things. I would say the most prominent ones are the ones where I'd forget about sleeping just to finish a game or finish reading a book like the final Harry Potter book, stayed up to finish reading it at 5.30 am and I just bought the book too.

Abyss is a great game by the way. While it's true that the experience would be somewhat diminished playing it on a 3DS, the storyline, characters and extra material should engage you in a lot more ways than other games can even hope to say.