I guess I'm in the minority in that I like all their albums although I do have ones I like better than others. It's hard for me to say which is my favorite but it would come down to Silence or Winterheart's Guild. Regarding seeing them live, I saw them when they toured Reckoning Night and they simply owned the place -- great live show, lots of energy. I saw them again, multiple times, on their most-recent tour and the energy was quite lacking and it almost seemed they were just going through the motions. Musically, they were still very good but their lack of animation on stage surprised me. I was also surprised they didn't do anything special for ProgPower USA, at least from a "hey let's switch-up the setlist a little bit" standpoint. I enjoyed their performance but I know they are capable of a lot more energy that was put forth the two times I saw them on the Unia tour. I'm curious to see how they will do when they open for Nightwish later this year on their Fall US tour.
