I must be different from everyone else... the first time I heard a death metal band I loved the vocals! I even got into death metal an entire year before Opeth, so I just added them to my awesome catalog of pwnage. It sort of depends on who you live with, too. My 3 brothers have all been big metalheads for the longest time now and they all listen to the same stuff basically.
There are slight differences: (I won't say their names because nobody cares)
Brother 1: progressive metal, black metal, progressive death metal (opeth!), and melodic death metal. no straight-out death metal though...
Brother 2: death metal, progressive metal (huge Dream theater fan), likes many of Opeth's songs but I wouldn't say he's "addicted" like bro 1.
Brother 3: death metal, progressive metal, and some more mainstream crap.
Brother 1 and 2 both play guitar really good, and number 1 is in a band!
This has absolutely nothing to do with this thread. Oh well, I guess I'm trying to say go get some relatives involved in stuff like this and spread the word! Death metal is invigorating and pumps you up! Opeth is different, they are really fun to listen to and only pump ya up when they need to! A band like Morbid Angel is good if you want to go flip out or something. Yeah, you could easy-listen to all of this but it's not as fun in my opinion... concerts are the best. Right up front!
EDIT: Wow, I just read my post and it sucks. Oh well