@DANDAN_THE_DANDAN
Personally, to me, tragedy has to emphasize a few aspects to be interesting. (Note I'll be specifically looking at tragedies and not tragicomedies because things like
Rosencrantz and Guildenstern Are Dead and
Waiting for Godot are their own beasts)
First is characters, and tragedies require strong characters with clear motivations to work properly. These characters not only have to be likable, though flawed in certain aspects, but understandable, following some kind of internal logic or reasoning that is understandable.
Next, the logical events of the stories need to play off of conflicting motivations, relying as little on luck or outside factors in the plot as possible. Sure a story may begin with one pivotal moment to setup the conflict that happens by sheer chance, but the characters in question have to prove to be their own undoing.
Finally, tragedies focus a lot on Irony, characters who don't know the full picture of all aspects, and if they just had some piece of the puzzle, some small aspect that was within their grasp, then crisis could be averted. One of the most powerful is dramatic irony, where the audience knows the fates of the characters before they, themselves, do and watch as it unfolds before them. (Examples of this include Oedipus Rex, which has the protagonist slowly uncover that the plague in Thebes is caused by his past actions he was unaware of, and the more he uncovers of the truth, the more it causes him to be corrupted, or Halo: Reach where you know that everyone is bound to die before you play the game, and all that is left is to watch it play out before you)
Usually what makes tragedies compelling is small ironies, issues or misunderstandings that compound into larger ones, though these issues have to have reasons as to why they are unsolved, such as characters refusing to hear each other out, or a lack of means by which to communicate.
Honestly, tragedies and comedies tend to follow similar formats and themes, which is why they're so similar and why there's a lot of comedies that can be framed as tragedies and vice versa.
@Justforthelulz
At least it revives dead threads