Usually it's the first bits of information and pictures... And that's both, not only one of them (well, I do have some sort of an opinion basing on either). If that's not enough, a maximum of an hour ought to do it, though it may not convince me completely (sometimes it's just hard to believe the game is bad and I expect it to get better).
Which reminds me that I should really trust my instincts a lot more before trying out new games.







