Seamlessly incorporating poignant melodies into trap music before it became ubiquitous in the ‘10s, the Atlanta rapper is as much at home on turnt-up party anthems as he is with emotional street ballads. It's impossible not to dance to his bouncy, triumphant 2015 single “Flex (Ooh, Ooh, Ooh),” and his pathos-drenched croon is the perfect foil to Young Thug's wild wails on “Lifestyle,” the breakthrough hit from the short-lived duo Rich Gang. An early cut like “Can't Judge Her” reveals Quan's deep, introspective side, showing that you can't judge a book by its cover.