"X" holds a special place in Elon Musk's heart, as it appears in various aspects of his life and business ventures. From his early online payment company X.com to the recent rebranding of Twitter to "X," Musk has consistently shown an affinity for the letter. Moreover, the letter "X" is present in the naming of his companies like SpaceX and Tesla's Model X, as well as in the name of his son, X Æ A-12. This pattern show that "X" is indeed a favorite of Elon Musk. In conclusion, "X" is not just a letter for Elon Musk; it's a symbol that represents his vision, innovation, and perhaps a touch of his unique sense of humor.