All Names of Allah are the fairest names. You can invoke Him by any of them. Be mindful not to over-emphasize a single attribute of His. (For example, the Merciful God is also a Just God). Disregard those who distort His Names or the meaning of His Attributes (like calling Him, father, son, the man upstairs, the destroyer etc.) Be assured that all of you will be rewarded according to your doings, and by no other criterion.