I wish more games tracked how long you played like Steam does (poorly). I know that Starcraft ate up two whole summers for me during high school. As in me playing it for 5-6 hours before I decided I should eat and get dressed. Not to even mention however many hours I would play it during the school year.
Luckily high school was so easy I didn't really have to study and got my homework done in class or I would probably still be there. Playing Starcraft and failing everything.