Most opera singers make my ears hurt, especially sopranos. But if I listen to them through my Bugera V22 tube amp (yuck!), with lots of "gain" (distortion by pre-amp overdrive??), they sound really energising and like honey to my ears!
That (distortion) is prolly one of the reasons why I liked Jimi so much in the sixties! Same thing when I "play" my Dia, a Japanese Strat copy!