My real problem with Opeth is not their music, it's their over-ratedness. Hard facts guys:
1. Opeth aren't very original, and the praise for them steals a LOT of thunder from better acts. Listen to songs like 'Enigma' or 'Twilight' by Edge of Sanity, or early Amorphis, or Ulvers first two albums for their inspiration, listen to Agalloch and Woods of Ypres for their contemporaries.
2. Most of Opeths songs are made by writing 2 or 3 standard length songs and clumsily bridging them together. Blackwater Park would work just as well if it was 16 tracks.
3. There is nothing technically more impressive about Akerfeldts vocals than there is about Dani Filths.
That said, they have some damn good tracks and you would be doing yourself a favour if you caught Opeth live. I haven't, I confess, actually been bothered to check out anything past Blackwater Park.
I really can't agree with most of this whatsoever.
Opeth surely aren't the most original band that has ever written and recorded music, but there isn't anyone else who sounds remotley like them within the metal genre. I don't think that praise from them steals any "thunder" from bands like Edge of Sanity, early Amorphis, Agalloch, the first 2 Ulver records, or Vancouver's shitty and incredibly
overrated within the underground Woods Of Ypres. Opeth have their influences within the metal genre, and surely they wear them on their sleeve, and most of those influences are early 90's Swedish death metal (see Entombed, Dismember, Cardinal Sin, etc.) but they are influenced just as much if not more by 70's progressive artists such as Camel and Comus.
I wouldn't say that they clumsily put songs together whatsoever. I believe, after listening to them since the "Morningrise" record, that they have exhibited an ability to write 10 minute songs that are seamless if not, on the off chance, brilliant in their song structure. I really don't think that this band has released a poor record, and while I've seen them many times live (each performance was excellent), I'd hardly consider myself a "fanboy" because they aren't void of my criticisms and I don't believe they've written anything as strong as "My Arms, Your Hearse", but I do think that they are a special band and that they deserve all of the attention and acclaim that they garner so I don't think that they are overrated.
I don't mind Dani Filth's vocals for the most part, aside from the fact that he uses them far too much and too often and doesn't allow the music any breathing room. I think Akerfeldt's vocals are exceptional though, and there are few vocalists in the metal genre that are better distorted vocalists and even fewer than are better at regular emotive vocals as he is and continues to be. It's nice that he can replicate them perfectly in the live setting as well.
You should hear the Opeth records you've missed, they aren't the best from their discography, but they are definitely worth listening to.