
Despite my general misgivings about Sherlock Holmes to begin with (Doyle was an idiot[1] and a prick[2]), they managed to capture all the enjoyable parts of the character (his manic depression, his OCD, and I think they threw in his drug addiction as well, though I can't remember specifically where it was in the movie) while putting him in a completely new story (a good thing, too... I don't think much of the originals).
While the ending (which left things open for a sequel or, perhaps, a series) was predictable, it was still enjoyable in the same fashion as the Star Trek remake we had earlier this year.
The one real flaw? That after years of Jackass and YouTube videos of people tasering themselves and their friends, the writers of this movie still don't understand the effects of electricity on the human body.
Oh, well. You can't have everything.
[1] He was widely known for his belief in certain supernatural phenomena, such as fairies. This wouldn't be so bad, except that for a guy who routinely wrote about a detective who paid attention to the smallest details... he didn't do much investigation, or look at many details, himself.
People would present him with the most ludicrous evidence of the supernatural (stuff a child would be able to look at and point out mistakes the fraudsters made), and he would swallow it hook, line and sinker. He had already made up his mind to believe, so he refused to think critically about anything which might result in him having to admit that he was wrong.
[2] He would regularly write the first portion of one of Holmes's adventures in the morning, eat lunch, and then make up some crap to solve it. Most of the time, he wouldn't even bother trying to figure out if his explanation made sense. This wouldn't bother me so much, if it weren't for the fame that he received as a result... it's the equivalent of watching Bill Gates win an award for his fair and ethical business practices.