I don't get what's even remotely entertaining about these kinds of films. It's like I don't see how they could possibly be any less creative than "lets put the most crazy horrible things we can think of on tape and since they're so shocking we don't even need to bother with trying to make movie out of it because its so SHOCKING".
Tough to watch? Sure. Boring as fuck? Check.
They're really no different from porn. Torture/gore movies have no artistic qualities and serve only as sick, twisted entertainment for sick, twisted people. Anyone who claims that such movies are "deep" is kidding themselves.
EDIT: Re-reading this, it sounds like I'm implying that porn only appeals to perverts. I don't believe that to be the case, but I still don't think porn can be considered artistic any more than torture movies are. And I find torture movies to be much more fucked up since the characters are suffering (although there are porn movies where one party is implied to be suffering, but those are pretty fucked up as well).