I don’t have a priest, maybe it’s because I have never been drawn to their aesthetics or lore. I would make a Tauren priest of the sun if their culture was represented in their class. Or a pandaren priest as described below.
Sunlight-themed visuals for sunwalker tauren; because they revere the sun and worship An’she. Perhaps some of their abilities are accompanied by chanting or gentle drum beats. tauren sunwalkers (paladins and sun priest) having warm sunlight visuals in their spells as they worship An’she. they would appear more sun-themed, with warm orange-yellow sunlight, reflecting their culture; sun-kissed feathers and glowing sunbeams in their spell visuals. golden fire birds. more prayerful animations as well; kneeling, or raising staff / sword toward the sun, or closing eyes and being calm and still. Calling forth radiant beams to energize, sparkling sun to blind foes, calming, tender warmth to heal friends.
I don’t really care for the old gods or whatever the priest’s theme is. cool it’s there for those who dig it. each race should have their own culture’s spell and ability visuals, animations and sound effects reflected in their class. night elf priests of the moon, with moonlight as/in their spells, starry magic, pearly sparks, a tender moonlit forest theme, with shimmering / pale / ghostly flora and fauna, luna leaf auras, bright glows and also shadow of the moon, darker version of those spells, all set to the sounds of harp or ancient celt horns or even soothing windchimes.
tauren sun priests and paladins (sunwalkers), pandaren ancient protection magic, meditation, celestial / sha themes, and traditional pandaren methods; bells, seals, coins, statues, herbs, etc. you hear traditions pandaren instruments such as bamboo flute, pipa, guqin, guzheng, zither, and gong, healing sounds in their spells.
Gonna be beyond cool when bard comes out and each race gets their culture’s traditional instruments and sounds! Anyway, priest can still use old god theme but only if it fits their culture/race.
Our classes could be super amazing if our classes had our race’s culture identity in their spell and ability visuals, animations and sound effects.