I agree a 100% that some song needs to be listened to several times before you start to like them. When I first heard yngwies "black star" I thought it was so boring. But now, after have listened to it many times, I think its much better! The same thing happened when I got into death/trash/black metal, at first it only seemed to be a lot of heavey distorted noise, but later I discovered the great melodies in the songs.

Anyways I'll check out those Opeth songs now!:)