Length, being an aspect of quality of games, should be subjected to the cost of the game. If I buy something from XBLA, I expect it to be a short, yet easily enjoyable game that will distract me for a bit from my major titles. It's gratifying to see, then, that there's games like Shadow Complex or Braid (which I swear still kicks my ass, God damn the nifty time controls) that will go on for a long time without feeling repetitive. However, if a game simply drags itself onwards, being as overly repetitive as TV ads, then the experience becomes too mind numbing, and the player tends to lose interest. I've rented Borderlands, and even though I've enjoyed it thoroughly, I've had to re-rent it several times in order to make something out of it, as it's not until you've worked your way through the levels and God knows how many different kinds of delivery quests that you actually start getting some fun out of finding guns that are actually worth a damn and slaying enormous monsters or enormous mobs or enormous mobs of enormous monsters, and even then, the game uses the same mechanic. Sure, it's the tried and tested MMO mechanic, but even we have a limit. If, however, a game manages to maintain the same level of quality through and through without ever feeling repetitive, and even if it does, an acceptable repetition, then it has achieved the title of awesome game. I recently acquired Fallout 3, and I've played it for about 8 hours, and I can tell there's so much more in store that I'm about to enjoy, if the game will stop kicking my ass for carrying too many drugs and not enough meds.
So in short, a game's length is proportional to it's gameplay quality. I can tell that, if MW2 had been bad in any sense of the word, people wouldn't have noticed the fact that it's short, or at least, they wouldn't have bashed it so much. However, it is, and if you really don't bear in mind that the game also carries a multiplayer and a co-operative mode, then you really aren't making the most of it. Honestly, in risk of angering Russ and Ben, EVERY single game should be accounted for both their single player and their multiplayer, and how one balances the other out, since multiplayer, specially online, has become our everyday bread, and trying to deny that fact is like trying to deny the fact that the sun will shine tomorrow.
Which I am more than ready to try and contradict
