I think it's weird that Six Degrees is under the top 4 of DT albums as in basically everybody loves it, like Metropolis. I've heard a lot of criticism about Six Degrees.
If you look at the other thread, in which folks are asked to vote for their top 3 DT albums (
https://www.dreamtheaterforums.org/boards/index.php?topic=54901.0 ), the gap between the four albums excluded from this thread (I&W, Awake, SFAM and SDOIT) and the #5 album is quite stark.
As of when I looked a couple minutes ago, 93 people had voted in that poll. The sum of the votes for all albums was 277 (which means one person only voted for one album or two people only voted for two albums). The top four received the following votes:
SFAM - 64
I&W - 59
SDOIT - 42
Awake - 33
The #5 album received only 15 votes, which is less than half the number that Awake received and just over 1/3 of what SDOIT received. These results are pretty typical.
Just to be clear, these results mean that 42 of the 93 people who have voted think SDOIT is at least DT's third best album. Conversely, it means that more than half of the voters (51/93) do not consider SDOIT to be a top 3 album. It does not mean that "basically everybody loves it."