Count me in the camp of those who felt the diversity up until The Odyssey, which was the bridge between the past, with each album relatively diverse from the other, and the beginning of the "chugga chugga metal" as it been aptly named. It's still good quality music, sometimes I liked it more (Paradise Lost, Underworld) and sometimes less (Iconoclast.... gah, that was too much of everything), but I think we all can take a wild guess at how the next album will sound like. Back with the earlier albums you couldn't have predicted what was coming next.