The Sun is exalted in Aries, making it the best Sun sign.When a planet is exalted, it becomes extremely potent and uses all of its inherent energies and qualities to produce outcomes.
The ego, your core self, and your heart are all ruled by the sign of Aries. Since Mars, the ruling planet of the Aries Sun sign, governs action and tenacity, this puts Aries in the driving seat.
Because the Sun is domiciled in Leo, it is the second best Sun sign to be.A planet is said to be in domicile when it feels at ease and at "home" with the energies of that specific sign.
This results in Leo's contagious friendliness and ability to have fun, as well as its dramatic abilities.
Because Scorpio and Aries are both co-ruled by Mars, Scorpio is the third best Sun sign.
Scorpio is devoted and motivated, exudes a seductive allure that is enigmatic, and, as Sharpe puts it, "everyone wants to be a Scorpio."