Right, now look through your titles, like, some of the ones you feel you play the most. Then look at a few others. You might be surprised, I know I was.
Then post up here where you thought most of your time would lie, and what surprised you.

I was thinking Half-Life would be well up there, what with me working on The Core and being a ProGoldsource guy in general. However, it's sitting at a fairly meager 55 hours.
I figured it would be higher than the counter-strike series anyway, seeing as I'm not a big cs player. CS1.6 and CS:GO beta are fairly close to one another at 12 and 11 hours respectively and CS:S is just... 179 HOURS!? I have considered however, that a lot of this could be testing Archie's maps, dicking around with bots and whatever else. Still, 179 hours accounts for a whole fuckton of dicking.
Then there are the obvious time black holes, the free-roaming RPGs. Fallout 3 was not on purchased on Steam but I know that's way up there. New Vegas is at 189 Hours, Skyrim at 170... Fuck. Not counting Fallout 3 that's already over 2 weeks of my life sunk into Bethesda titles. Sad thing is, I'm yet to finish either of those games, and I need to start the Mass Effect series after that...
Anyway, that pretty much covers the major ones. A lot of my other games are sitting around the 30 hour mark and then there are the bottom feeders, some because I just don't feel like playing them and others because I haven't got round to it yet.
Worms reloaded - 8 hours
Duke Nukem Forever - 11 Hours (and never likely to move from that spot ever)
TF2 - 13 Hours
Operation Flashpoint RR: 4 Hours
Just Cause 2: 2 Hours
Metro 2033 - 59 minutes
Seems I need to finish the games I've got rather than complain about the new ones I can't afford... What's that? E3 starts on the 5th? Fuck.
tl;dr - I play a lot of games, now get out of this thread.