Billy Corgan is an interesting one....I'm mostly on the side of 'elevates' because I mostly like the way he alternates between an earnest falsetto and a more darker, more gravelly growl. I say mostly because sometimes it's great (the 'let me OUT' bit from "Cherub Rock", which ups the emotional ante and builds along with the revving guitar) and sometimes it's grating (the 'i used to be a little boy/what's a boy supposed to do' bit from "Disarm" which just sounds like a toddler throwing a temper tantrum). This commentary assumes you've excluded any release from Smashing Pumpkins and his side projects with release dates any later than 1995, all of which really really suck.