To me...
While on "The gallery", "The mind's i", "Projector", "Haven" and even "Skydancer" and "Damage done" there were always some songs that totally stood out and were unquestionable masterpieces (do i really have to list them?), on "Character" there don't seem to be such songs. Sure, "Am i 1?" and "My negation" are very nice songs, but nothing really seems totally new and perfect, as with other songs. Nothing on that album really seems to stand out from the rest of the album, or even from the rest of DT, for that matter, the way some songs used to.
I think the Golden Age of Tranquillity was over the minute they released "Damage done".