He's placing people, for the most part, in a situation where they'll have to go thru great pain or sacrifice something to live, it's his way to make people who are wasting their lives wake up and start living.
I never said he wasn't a freakin' nutjob, but at least it's a little more original than 'I wear a mask and I like stabbing teenagers'.
Seems almost all the time, if you take your punishment, and follow his rules you'll live.
I see him as a psychopathic Derren Brown figure, someone who understands the human mind so well, that he's even managed to map out how things will go...
I'm sure anyone who's seen a few of the movies, or even some of the later movie posters will know that spoiler, but I'm being extra careful because I haven't seen 6 yet, and I'll be most annoyed if I get it spoiled
Always annoyed me how Saw and Hostel got lumped in together as torture porn as sure, Saw was violent, but it had a plot, and a reason, whereas Hostel to me just felt like they were gratuitously filming the torture for kicks, and it was the sole intent of the movie.
I also think if Saw was like Hostel, they'd rely on nudity and sex to draw in the teen demographic, whereas sex is almost irrelevant in the series.