For me, it's the vulnerability, openness, and richness of his voice that does it.
The use of sign language and well-placed moments of silence add to the richness of the material.
What a love, joy, adventure and richness you and your brother brought to our home.
But I think his backstory is just part of the richness of the character.
Indeed, red — because of its vibrancy and richness — has served as a powerful symbol since the beginning of civilization.
The grandeur of this stupendous work is greatly enhanced by the richness and beauty of the adjacent country.
His language has the richness and sententious fullness of the Chinese.
Each gained its effect mainly by outline and balance of masses rather than by richness of detail.
The woods were in all the depth and richness of a Southern spring.
That region is especially characterised by its richness in bulbous and tuberous plants.
Old English rice "strong, powerful; great, mighty; of high rank," in later Old English "wealthy," from Proto-Germanic *rikijaz (cf. Old Norse rikr, Swedish rik, Danish rig, Old Frisian rike "wealthy, mighty," Dutch rijk, Old High German rihhi "ruler, powerful, rich," German reich "rich," Gothic reiks "ruler, powerful, rich"), borrowed from a Celtic source akin to Gaulish *rix, Old Irish ri (genitive rig) "king," from PIE root *reg- "move in a straight line," hence, "direct, rule" (see rex).
The form of the word was influenced in Middle English by Old French riche "wealthy, magnificent, sumptuous," which is, with Spanish rico, Italian ricco, from Frankish *riki "powerful," or some other cognate Germanic source.
Old English also had a noun, rice "rule, reign, power, might; authority; empire." The evolution of the word reflects a connection between wealth and power in the ancient world. Of food and colors, from early 14c.; of sounds, from 1590s. Sense of "entertaining, amusing" is recorded from 1760. The noun meaning "the wealthy" was in Old English.