I always thought Powerslave had an awesome opener and closer. The way it opens up with a bang in "Aces High" and ends with "Rime Of The Ancient Mariner" is a stroke of genius. Ending an album on an epic and powerful note instead of fast always makes sense to me.
I also really appreciate how Jon Schaeffer (Iced Earth) put those awesome trilogies at the end. It makes for a very worthy and final closure of an album. Pure genius.
I've also heard many times how important it is to make the first couple of songs on an album killers to catch someones attention. But the ending is just as important. It's the last thing you hear before the CD ends and the impression it leaves will most likely stay with you because of that.
So IMHO, the opener of an album should be exciting and explosive enough to make you wanna hear the rest (not necessarily fast). The closing track should contain everything that appears elsewhere on the CD IMO. A bit more epic and powerful with perhaps some time changes or proggy overtones. It gives the impression that the album sort of matures at the end.
So I think Powerslave is a winner in that regard.
