Hhahah, haven't seen the postman, and your right Waterworld wasn't as bad as everybody made it out to be !!! Not sure I can say that I actually enjoyed it.
I took my little sister to see John Carter and we actually both enjoyed it. Yes the plot was a bit thin, and it was perhaps a case of special effects just for the sake of it the film didn't have it's merits. I think the film was a good example of a production company not doing its due diligence !!!
I think the release date was all wrong, they should of waited till the kids were off for Easter, that would of given it a fighting chance. All in all it was a risky film, there were no new concepts in the film and it stuck to closely to the pre scripted structure of modern day sci-fi films. Introduce stranger that has super powers, stranger meets women the end

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The plot was to predictable and it didn't really mature or grow, his super powers should of been explored more and increased. The power to jump very high will not win anybody wars !!!
Just read what I've written and it feels like I've slated the film, just to recap I did actually enjoy it still. Went after eating a nandos, got a extra scoop of chunky monkey free so maybe I was already in a good mood

“The critics have been wrong before.
They said Waterworld and The Postman were rubbish but I thoroughly enjoyed them both. Mind you I'm strange.
”