Nevertheless, this is a lot better than I thought it would be. I missed the 3D incarnation as we were watching the DVD rather than the cinema release, but after a while you stop looking at the CGI and start enjoying it. This is a 'Beowulf' where the story, although different from the poem, is actually very far from shabby.
Without giving too much away, the main difference from the poem is that in the poem, there is no connection between the monster Grendel and his mother on one hand, and the dragon in the latter half of the poem on the other hand. In the film, a connection exists. Neil Gaiman and Roger Avary do a professional job of tying it all together in a satisfying Hollywood way, without betraying the basic darkness and sadness of the story; it's not like Beowulf rides off into the sunset with Wiglaf at the end. Crispin Glover is genuinely scary as the tormented and raw-boned Grendel, whose main problem is that he just can't stand the sound of people having fun, although since most of this fun consists of hairy men singing lewd songs you can see his point. Angelina Jolie's animated self spends all her on screen time walking around without any clothes on, something that apparently gave Jolie a blush when she saw a cut of the movie. (One of the more eerie things about this film is that the cartoon Angelina Jolie looks marginally more realistic than the actress herself.)
Despite an accent that's more Stockwell than Geatland, Ray Winstone does a fine, sombre job as the hero, although my wife thought that the animated Winstone looked more like Sean Bean. Brendan Gleeson does a splendid job in the niche he's carved for himself of Hairy Sidekick. The acting honours, or at least the animation honours, go to Robin Wright Penn (or whoever worked on her character) as the pale and melancholy queen; she has moments of subtle hesitation and sadness that struck me as a triumph of CGI acting.
There is much excellent smiting, some of it unfortunately toned down a little in order to keep a PG-13 rating - so we don't actually get to see Grendel biting men's heads off, just people's reactions to him doing so. Most importantly, the story is not a travesty of the original. It's thoughtful and interesting, as you'd expect from a writer of Gaiman's quality (if not from the author of 'Killing Zoe') and contains some striking meditations on the power of legend and reputation. Plus, there's a really huge kick-ass dragon. 'Beowulf' is a strange and unexpected treat.