9/10. Perhaps it's because he knows his vocal abilities and writes songs that will suit him, but he's one of the best I've heard.
I'll give him an 8, sometimes he sings in a really annoying childish tone that I just can't stand (listen to the end of Endlessly, She Said, the way he sings the very end ruined the entire song and ending of the album if you ask me), and sometimes he's just horribly flat when they play live. Other than that, great range, good variety of tones in his voice, great stage presence.
I have to give him a 10/10. Amazing versatility and range, he's my favourite vocalist. Songs like This Time Imperfect and The Great Disappointment are outstanding. I didn't find he was a bad screamer either.
I'll give him an 8/10. I like his yelling voice, I like the way he sounds on everything prior to Sing The Sorrow. I get annoyed by his high notes a lot sometimes.
I'll give him a 2 because first of all, I think he sounds like crap. And second of all, he's the posterboy for super flambuoyant emos.