It is the picturization of one of the greatest tragedies. Everyone heard the story of Titanic.
Better screenplay to introduce a very compelling love story in the plot.
Directors vision and temperament in recreating the exact conditions of the ship.
Great effects by entire technical team, those last minutes of Titanic is heart breaking.
Casting is perfect. Leo and Kate are born to be those characters.
Supporting cast were also good at their own characters.
We feel more about Leo dying than the thousands. The story telling is so great to balance the tragedy with another emotion to keep the audience thrilled rather than scared