Hergest Ridge is my favourite even though it is not as popular as TB or Ommadawn - I remember putting my head between a pair of speakers listening to Ommadawn as I didn't have any headphones! The way side one builds up is tremendous. I enjoyed Inacantations too though not as much as the first three. After that MO went a bit too poppy for me but I understand he was just working through his appalling contract with RB so wasn't as bothered about what he produced!