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

I just remembered now, I spent countless (and some because I fell asleep while playing) hours upon hours between Disgaea games. Sometimes it is grinding, other times it is figuring out Geopanels to null everything and get the bonuses, and much time to item/character world... Don't ask, but somehow all the strategy and planning sometimes made me more awake than sleepy and lost countless days of sleep that way too.