Deadpool might just be the closest to source material comic book adaptation of recent times. It begins with comical credits and ends with the anti-hero breaking conventional superhero behaviour tropes. It's a thoroughly enjoyable mess and I'm happy to say Ryan Reynolds has redeemed himself.
The comical credits and fourth wall breaks are consistent with the original Deadpool comics, just the first issue of the standalone series opens up with fourth wall breaking narration and odd-defying antics from the protagonist. The movie does a good job of hooking its audience in and then taking several long trips back in time to recap just how we got to this barbaric entrance. It's a Marvel story and the characters are pretty two-dimensional but even then they're pretty well fleshed out and consistent. Nobody grows, nobody shrinks, nobody reveals any great Buddhist secrets, but they all have a jolly good ass-kicking ride.
As a Deadpool movie I think it is outstanding and pretty decent in its own right. It does have a certain degree of fanboy fodder and I think that uninitiated audiences may be a little put off by the fans, skewing their own views on the merc with a mouth. It's an anti-hero story with an anti-comic relief, high octane action and bundles of bad jokes - mostly good-bad. What I found particularly interesting was the display of teenage apathy accompanied by some of Wade's least risqué lines. It gave this air of "oh you're too young to understand me and find me funny, I'm full of mature irresponsibility!" Although I imagine Deadpool's relationship with the teenage mutant is supposed to serve as a metanarrative on the potential audiences' different takes on the character, I feel like it was one of the weaker parts. And I'm not a big fan of a daft Colossus; serious yes, daft no.
Ultimately, Deadpool is a movie that delivers what it promises: writers who are the true heroes, a CGI character, a hot chick, a comic relief, all-out action and shameless humour. It's worth seeing it whether you're a fan or not.