The only time that stands out in my mind that comes close to this subject is when I played Tales of Symphonia for the first time on the gamecube. I was around 13 at the time, and was renting it from the Roger's Video when they still did that sort of thing, so I only had access to the game for a short amount of time. 5 days to be exact. And I played the shit out of that game because I wanted to beat it before I had to return it. I ended up beating it the day before I had to return it, after spending 8-11 hours each day playing it and making progress, while going through all the sidequests I could find (never knew about the dark weapons...makes me sad) and clocking in somewhere close to 50 hours on my save file. Felt pretty satisfied.
Other than that, I don't have incredibly long gaming times, but I would play games 4 or 5 hours out of most days as a kid, either at home or in a friends garage playing classic Halo all afternoon, and fighting over who got the gimpy controller.
Oh, well, there was Guitar Hero. That certainly ate up most of my afterschool/free time when it first came out too. I remember the very first day I played it, I went for about 7 or 8 hours and worked my way up to hard and started trying to do that with 3 fingers, cause that game is not friendly to the pinky.
