Deciding what to watch can be the most difficult part of movie night. Ultimately, finding the right film comes down to personal preference, but we’ve rounded up some insights to consider when you’re searching for the perfect film for any situation.If you’re stressed, check out a comedy. That seems straightforward— after all, a tense movie might only make you more stressed—but there’s a real, biological reason for aiming for a chuckle. A study found that laughing while watching a comedic film causes your blood vessels to dilate by 22 percent, counteracting the effects of stress hormones.