I'm a huge fan, VdGG is one of my favorite 70s prog acts. There are very few bands that released a streak of five great albums, but Peter and the gang are one of them - every album from H to he up to World record is brilliant. What gets me the most excited about this band are Peter's vocals and lyrics, the melodies are either gorgeous or terrifying, and of course, the way they construct the songs is the epitomy of prog.
Favorite songs: The Undercover man (a masterpiece), The Emperor in his war room, Childlike faith in childhood's end, La Rossa, The Sleepwalkers, When she comes, Lemmings.
Also, some of their recent stuff was interesting. I wasn't too impressed by Do not disturbed, although I listened to it quite a bit when it came out - however, A Grounding in numbers still blows me away.