Creativity, confidence, and footwork are all incredibly important in becoming a good ball handler.
Creativity meaning never being afraid to try new moves. Kyrie, Steph, Harden, and many others have become innovative in the game by creating new moves and selling defenders on new types of fakes to get them to overreact and open up offensive opportunities.
Confidence is equally important in ball handling. I’ve seen guys who are great at ball handling in drills, but it doesn’t translate to game because they either have bad footwork or they don’t have the confidence to be aggressive against defenders.