Do yourself a favor and watch the anime (just the Kira vs. L arc)
One of the best battle of wits stories you'll ever see in any medium.
As for the movie, I guess I came in with very low expectations, so While it wasn't terrible, It wasn't good either. the deaths reminded me of Final Destination.
Final destination, the first one, was solid, but after that it was just a "what kind of dumb stuff can we get people to pay to see?" type of stuff. I didn't get that feeling at all from this. And I mean, it has its limitations from the explanation in the movie, you can't have something ridiculous kill you, it has to be within the realm of possibility, or rather "normal" which most of those deaths were, if not all of them really.
The only "what the hell were they thinking?" moment I had and it was more of a cringe worthy part for someone that isn't well versed with the Death Note source material, was the cringe-y screams by Light when he meets Ryuk for the first time. Kind of stupid, but again, he's a high school kid being freaked out by a demon. I've seen guys I played football with that were massive meat heads scream more femininely than him when they saw a spider in the changing room....so I mean...yeah.
I've seen stupid negativity by people ruin movies that were actually enjoyable before. I was told time and time again by internet trolls, "film critics" and other people that The Mummy was not an enjoyable film and that it was an abomination. Literally everyone I was in the theater with during that movie, after were talking about how it wasn't bad at all from what they were hearing. I wish more people just allowed themselves to watch something and enjoy it without so many outside interference's.
I mean I think the whole notion that Tony Stark created Ultron was moronic and even his death, but that movie made millions, god knows why to me, I thought it was stupid, but I would never force others to think that, millions of people enjoyed it, I just didn't, but I didn't let someone tell me not to, i went and saw it for myself but again for me I was too familiar with the source material, so I can understand the people that just hate it because of that, but hey, Death Note the movie was pretty decent.