I'm quite interested in hearing about movies people think are good, and why; but when it comes to people griping about movies they went to that they wished they hadn't, it seems a pretty pointless exercise.

The first way, it might help me see something I wouldn't otherwise, and appreciate it more I would otherwise. The second at best might save me seeing somethimg I probably wouldn't see in any case, and might actually put me off seeing something I actually might enjoy.

In order take any notice whatsoever of what a film critic, amateur or professional, has to say you have to have learnt quite a lot about how their tastes compare to yours. There are newspaper critics where I know that a favourable review means a dreadful film, and a terrible review almost guarantees I'll like the film. But I've had a chance to get to calibrate them, so to speak.