Lessee... on average, I play games (be it MMO like Runescape (I don't degrade myself to playing WoW), a PC game (replaying Fallout 3 at the mo with some downloaded mods, waiting for New Vegas), my DS (Professor Layton ftw), my stand-away games like Darkthrone or just random Flash games on sites like Kongregate or Armor Games) from just about the moment my computer finishes booting up a few minutes after I wake up [the joys of having my computer next to my bed
], till about half an hour before I go to work at midday (or 1pm, depending on the day). I usually wake up at around 7:30-9am... so on average that's about 2 - 3 hours (giving time to grab breakfast after morning rituals (shower, shave, etc)) on weekday mornings each day (say 3 hours a morning, so ~15 since I work Mon - Fri), then when I get home 6-7 hours later, I sometimes cook, I sometimes have chores, go out Thursdays... so usually on my comp again from about 8pm till 1am, so that's another 5 hours per night (totally ~40 so far).
If we're going to assume this is a weekend when I'm NOT doing anything, I'm usually again at home gaming all day. Same wake up hours and bed (7:30am-9am till 1am). Cutting out time to eat and bathroom breaks (and the usual hygiene stuff), I'd say that's about 10-12 hours of assorted gaming per weekend day that I'm free. Then again, I'm usually out with friends or in town for at least some length of time on a Saterday... Sundays are usually my free day.
So cutting out Saterday as a less-than-average time and just counting Sunday's hours, that leaves me with a total of around 50 - 52 hours a week of gaming. Very little of that is what most count as "Extreme Gamer" games like Call of Duty, Grand Theft Auto, Gears of War, WoW, etc.
I don't count myself as "extreme" when it comes to gaming. I count myself as someone who is lacking in a social life. "Extreme" gamers would be those who spend every waking moment, and much of their nocturnal hours, playing games that have no real end or point to them.
PS. Sorry for the starting explaination...