One characteristic is accuracy. It should stay true to the real events as much as possible. For example, in a historical drama, the dates, places, and main actions should be correct. Another is good acting. The actors need to be able to bring the real - life characters to life. In 'The People v. O.J. Simpson', the actors did a great job of portraying the real people involved in the case.
Well, 'When They See Us' is also a must - watch. This drama is based on the true story of the Central Park Five. It shows the injustice they faced, how they were wrongly convicted, and the long fight for their exoneration. It's a very powerful and moving series that makes you think about the flaws in the justice system.
Most dramas aren't always true stories. They can be inspired by real events but often have fictional elements added for entertainment and dramatic effect. Sometimes, they are completely made-up to tell a unique and engaging tale.