Ok, heres the choices. Screech: most common in black metal type stuff. Anders from In Flames screeches. Growl: Alot of straight death metal uses these types of vocals. Cryptopsy.. etc. Clean: Melodic death bands use them (in) frequently. Black Metal band use them sometime as well. Power metal bands use them all the time. Rasp: Kind of hardcore-ish vocals. Metallica would fit in this category. What's your fav? And why? Not keep in mind... there are lots of varieties of these (as well as good singers and band ones), so keep that in mind.