Thank you for making this a thread omg
My fave would prob be strong /screaming vocals! Like not pure screamo (tho thats cool too), but i mean like singing your lungs out type stuff. (Best examples i can give is blood in the water, holding out for a hero, slow dancing in the dark, cotards solution, dull knives. Or i guess theatrecore lol), esp when you can hear them struggle/their voice breaking. I always get shivers
also when artists use varying tones or change their vocals, either to give the song a story or just to mess around and have fun. Makes the song feel more alive imo