These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Harsher in Hindsight: The movie was pulled out of its run in Japan due to the 2011 earthquake and tsunami. Later, the studio donated profits from the film's DVD sales to humanitarian aid.
Narm: The scene with Matt Damon allegedly channeling the dead twin isn't particularly convincing and kind of hilarious if you're in the right mood.
Many people believe Damon wasn't really reading the twin's brother (by the end at least), so the fact that it's "unconvincing" could very well be the point.
One-Scene Wonder: Richard Kind, Bryce Dallas Howard, and several others. The smaller parts are extremely well cast.
Tear Jerker: Several, but a prevalent one is Melanie's breakdown after George reads her.
Visual Effects of Awesome: The opening with the tsunami. Despite being all CGI, the effects are very realistic. The film went on to get a well-deserved (if controversial) Academy Award nomination for its visual effects.