From the Sword Coast Adventurer's Guide: "The followers of Sune have a reputation as hedonists, and so they are, to a degree. More than that, her priests foster beauty in the world. They do so by creating art, by acting as patrons for promising talents, and by investing in merchants who bring luxuries to far-off places that have never seen satin or tasted a luscious wine.
But beauty is more than skin deep, say the Sunites; it issues from the core of one’s being and shows one’s true face to the world, whether fair or foul. The followers of Sune are believers in romance, true love winning over all, and following one’s heart to one’s true destination. Fated matches, impossible loves, and ugly ducklings becoming swans are all in the purview of Sune."

So it's not just beauty, but love and romance that the Suneites worship. They like bringing new luxury goods to far places that have never experienced them. They also create art and act as patrons for artists. Together that sounds like more of a general good alignment than neutral to me.