Reasonable on 25 March 2009
For me its about quality. If the game is a quality game length/replay don't matter to me.
I'd rather play a great game once than an average game with lots of unlockables, MP, etc. more than once.
If the game is great I don't care if its short (ICO, Portal, etc) or long (Deus Ex).
While of course more great content seems better than less, the enemy in long games IMHO is padding.
It depends on the game too - some are designed really as a single playthrough experience, while others are designed specifically for replay.
But quality I say, always quality first.
Try to be reasonable... its easier than you think...
