1984 is one of my absolute favorite books. It had such a profound effect on me after the first time I read it, I literally tore the book into two halves a few seconds after reading the last pages. I've read it a number of times since then and still love it. It grows even more on subsequent readings.
If you're fresh off of 1984, I'd actually recommend you read up on Modern Russian and European history, from 1900-1950s, particularly British policies during the second world war, and Russia's political atmosphere in the early 20th century, to see the reality from which Orwell based his ideas on, and how he saw the world feasibly turning toward this end -- so much so that he nearly named the book 1948. Very scary stuff. It might actually be more convenient to pick up a companion book to 1984 to have all these things explained without need for interpretation.
If you're fresh off of 1984, I'd actually recommend you read up on Modern Russian and European history, from 1900-1950s, particularly British policies during the second world war, and Russia's political atmosphere in the early 20th century, to see the reality from which Orwell based his ideas on, and how he saw the world feasibly turning toward this end -- so much so that he nearly named the book 1948. Very scary stuff. It might actually be more convenient to pick up a companion book to 1984 to have all these things explained without need for interpretation.