Got similar opinion about somewhere in time but I prefer rather the opener, one of the best Maiden songs.
Definitely my all-time favourite is Poweslave. There is 1 or 2 weaker tracks, but rest of them are a dynamite. It's also one of my first metal albums, fortunately memories don't affect my ears - to this day I'm going crazy when I hear it.
But Maiden released only few less powerful LPs - Killers, Piece of Mind, Fear of the Dark, and finally, last two cd's (these are really horrible).
In opposite to majority, I like Dance of Death, title track is epic. There are some boring moments, but overall it's a good album, way much better than massively overrated Fear of the Datk.