Zekkyou on 19 March 2013
Depends a lot on the game in question. If it's something like Uncharted or God of War which are constant streams of action and incredible story moments, then a 10 to 12 hour story would be a perfectly agreeable length. If we move to the other side of the spectrum at RPG's, then anything less than around 20 hours (including side quests, grinding etc) then I'd be disappointed.
So pretty much it depends entirely on the quality of the hours in question. I hardly expect Pokemon to blow my mind each hour like a Naughty Dog game, but I do expect it to pump out several dozen entertaining hours.
