I spent zero hours from birth through age five.
Spent maybe an hour a week max from age five through age eleven.
Spent easily 40 hours a week from age eleven through nineteen.
Probably averaged around 25 hours from age 19-27.
20 hours from age 27-32 while I was married.
Past six months I've spent a lot more time gaming, closer to 35 hrs/week.
So...adding up those rough estimates...
0x260 + 1x312 + 40x416 + 25x416 + 20x260 + 35x26 = 33,462 hours (approx.)
Divided by 8765.81277 leaves 3.817 years, or approximately 3 years and 10 months spent gaming. 11.6% of my life, or 2.79 hours a day, every day.
In point of fact, that doesn't actually sound so bad. Wouldn't we all like to have almost 3 hours a day to do what we love most?