Everybody knows who the Jackass crew is. You do too, don't you? Of course you do. Everybody does; and within a minute of watching any clip of it, you automatically know whether you love it or hate it. (To paraphrase the Aisle Seat review of the second film)

I'll admit, I love the series. Why do I love it so much? Well, for starters, the Jackass series seems to be physical comedy in its purest form; there's no need for a plot or really any attempt to tie them all together; the stunts are just one clip after another. Here's an analogy - imagine your typical physical-comedy film as a scrambled porno channel: Jackass is that same channel in HD, with all the boring parts cut out so you get to enjoy the stuff you laugh the most at.
Second, in a way, the Jackass Crew can act as something as a role-model. Now, don't misinterpret me here: I don't find them role models by their actions - by their actions, they're probably some of the worst role models in moving pictures - but by their attitudes. This is especially evident in Number Two. Take, for example, Johnny Knoxville: he faces a firing squad of rubber pellets, nearly gets beat up by a skater dude, avoids a rocket through his chest by mere inches, and takes on not one, but TWO bulls. Or Steve-O, who takes a leech on his eye, and shakes it off as a Badge of Honor. (To say nothing of the sobriety he's taken up; more on that in a minute.) Or Ehren McGhehey, the victim of the gross, freaky prank near the end of the movie. Or even two part-time performers, April and Phil Margera, who fell victim (Well, April technically; Phil was in on it too) to the Ol' Switcheroo. Despite everything they put each other through, no matter how physically or mentally injured they might end up from what they do, they ultimately manage to laugh it all off and move on to even greater performances. Hell, even after official filming was finished, Knoxville was still hyped up and doing stunts, trying to jump over parking meters and signs. Theirs is an attitude of perseverance through tough times, and something I find to be admirable. (Charlie Brown's a great role model for similar reasons, though I think you'll find he's much more family-friendly.)
Third, similar to the last point, the whole Jackass Crew really cares about each other, and ultimately look out for each other. In the first movie, when the golf cart Knoxville and Dunn are riding in flips over, everyone's quick to run over and try to help out Knoxville when he ends up trapped inside. Outside the series, several of the cast members came to Steve-O's aid when he became suicidal, and got him help. Steve-O has been clean ever since, over two years and counting. See the short documentary "Steve-O: Demise and Rise" for an in-depth look at how everything went down (It floats around YouTube in clips, but MTV hosts it on their site in its entirety last I checked); I highly suggest watching it, it really presents a heartwarming side to the whole gang.
Fourth, really, these people are living the American Dream. I mean, think about it: they're a group of friends doing the crazy things that the rest of us sit around and just think "What if...?" about with our own friends. And they make millions from it!
I had other points I was going to make, but I don't remember them now. I am sure they were decent points.

In conclusion, I am anticipating the release of this movie! I shall be there Thursday night, at 12:01 AM, for the very first showing. I can't wait to have Chris Pontius' big 3D dick flying in my face! I have work the very next morning at 9 AM, but I don't care, a good thing's worth playing through rough times for! WHOOOOOOOOO~
Christ, I feel like I just wrote a high school essay.