I agree about When. I even undeservedly underrated it at first. Demon of the Fall seems a bit overrated (even though I like it, as I like all Opeth songs, or at least parts of them.) But The Amen Corner is far better in my opinion.
The first song by Opeth I remember listening to was Bleak, followed by The Drapery Falls, and Dirge For November. And even though I hadn't heard growling to that extent before, Harvest didn't draw me to them as much. It was their progressiveness and their contrasting sound that drew me in. And it was definitely Bleak that did that most. Those remain my favorites of Blackwater Park, even though I never liked Deliverance as much as Morningrise or Orchid, so this idea about new fans only liking the new albums/overlooking old albums isn't always true.
Forest of October and Apostle In Triumph seem to be everyones' favorites of Orchid, and they are mine as well, but The Twilight Is My Robe and Under the Weeping Moon have some of the best lyrics and melodies on that album. Lyrics like:
"We are all bending
Our tired leaves over your empty shell
In the sign of true esteem
Are you beloved lord
Sighing deep under these waterfalls?"
and
"Burn the winter landmarks
That said I was there
Burn the spirit of cold
That travel through my soul"
It seems like "The Moor" is many a favorite Still Life song, but "Moonlapse Vertigo" is also a great one. Also "White Cluster" seems to be overlooked because of "Serenity Painted Death", despite being such a great closing song for the album.