I'll give it a try. It is lengthy but I don't know if is a good explanation.
I think it's in my case also a combination of factors. Taste is a very individual thing but I believe that it can be influenced, shaped by outside factors. By impressions, by course and length of time, by circumstances, by what we find important, by norms and values, by other music and even by people...
I don't know if I can explain why I like a certain melody or atmosphere. I am not sure how that works. But I can try to describe elements that I like, and my personal circumstances, and moments in time.
I became a fan in the autumn of 1991. I have heard the album with Mother Russia in a time before I ever saw Maiden live. I was positively surprised because after hearing Holy Smoke and Bring Your Daughter I hadn't expected there would be such different (and better) material on the album. I even waited with buying the album some time after Fear of the Dark came out.
I have heard the album in a time when there was not as much other musical "distraction" besides pop music. No older brothers or sisters with a record collection (my parents record collection wasn't heavy), no internet, and the only CD's I had were Maiden CD's. I knew a couple of Priest LP's and I'd heard some Kiss and GNR albums, and I was just about getting into Helloween.
Maybe these conditions gave me more focus on the (certainly compared by today's standards) little collection I had. I could focus on everything Maiden had done. I had fun with play the same albums over and over again. These days I am in a very different phase. I prefer to spend my time on albums by different bands, and genres. (So that makes it more difficult to appreciate new Maiden).
Before this album, I had heard all the eigthies albums and also was in love with the video/concert footage from Live After Death, Maiden England, The First 10 Years & 12 Wasted Years. At that time No Prayer wasn't as good to me as the previous albums. I noticed Bruce sang with a rougher voice, and the songs were also grittier. But were they bad? No. On the contrary, I still liked them, and some of them a lot.
Nowadays I like the album more than the ones with Di'Anno and The Number of the Beast and also even a bit more than Piece of Mind.
I am afraid that originality is something that I am bothered about, more often than most other members. That explains that when I hear recent Maiden, I recognize things from previous albums, so I tend to give "extra" credit to older songs, or less credit to newer ones, it depends on the way you look at it. ;-) The more albums Maiden released since No Prayer, the more difficult it became for them to stay original (in my eyes). So the chronology could play a part as well.
Like everyone out here, I also see the enthusiasm by the current line-up, I love Bruce these days, I love Adrian, love the rest. But I do not think that all their recent records are (much) better than some albums from the nineties. And some of the epic songs in the nineties were IMO really bulls eye material.
Mother Russia is my second favourite song of the nineties (The Unbeliever comes first). Overall, it's in my top 15 and from this remaining bunch only beaten by Powerslave, Rime, CSIT, SSOASS and Infinite Dreams.
What do I like so much about the song?
I like the lyrics. I find it special to hear an epic, bombastic song with a rich instrumental part squeezed into Bruce questioning some real questions that had to do with the current, real world. Maiden did that more often, but this was a first. The line "Can you be happy now you're people are free" is dead on, and more than years later, we can still ask this. And we can wonder how free the people really are. I find human rights important. In Russia minorities have not so much rights. There is no freedom of press. People who sing a protestsong can go to prison. Opposition has a hard time. Even though that line was sung in a time when the USSR started to loose power (and when people indeed might have had more freedom of some sort), nowadays I find that Russia has become a police state. So the topic is something vital to me.
The intro has a nice melody with pauses. Fascinating to hear these sudden parts with short moments of silence in between blowing out of the speakers.
It sounds so mysterious and at the same time so much in your face. And this Eastern vibe, maybe Russian (not sure where this "mode" comes from) I find particularly attractive. The beginning of the instrumental mid piece uses the same figure, with some awesome keyboards and distortion guitars reminiscent of black metal(!) in the background. A neat cold touch. There are different moods. One of the more emotional parts are the dramatic guitar lines right before the solos. A very majestic song, well suited for three guitars.
Maybe this song stood out so much on No Prayer, because it had the bombast of the previous title track (a song I like more). Not original? Well, maybe indeed, musically Seventh Son of a Seventh Son served as an example. But the melodies are different, and lots of its rhythms are as well. It is really a different ride. And the keyboards are used in a different way (and also sound different).
I regret that I have said that people have apathy towards the nineties. I should not have said that. But I honestly think that the era disappeared in almost unpenetrable smoke, created by the fire of the successful eighties and the magic of the current line-up that still tours with so much joy. Sometimes I just think that the nineties are liked less because they were different. Different line-up, different sound, and nowadays: a different exposure.
I really think that people do pay attention to these things. I cannot prove that all you guys are doing it so I should not have said what I said in my previous post. I apologize for that...
Lots of fans (especially in the States) who followed Maiden since the eighties turned their back at the band and came out of their holes when Adrian and Bruce rejoined (some found out a few laters even, totally disregarding everything Maiden was doing). Also many "new" fans (1999-) dislike the nineties. The fact that Maiden mostly ignores this period (as far as they're concerned the nineties didn't exist; only the song Fear of the Dark and Afraid to Shoot Strangers exists) hasn't helped much.
I have seen the nineties without that smoke. I have seen Maiden performing nineties songs with fire in their eyes. I have learned to appreciate Iron Maiden without Adrian Smith. In the nineties I loved him from his work in the eighties but I realized he was doing other things "nowadays". What Maiden did without him, I still found good (same with The X-Factor: I was not blinded by Bruce's absence). So I didn't miss him on the albums. On the contrary, I understood that he wanted to do other stuff and one of the worst songs on the No Prayer-album had a Smith co-credit.
(When I am saying this I realize that I can also not listen to recent Maiden without context of older music. But at least it's the music, and I am not thinking about other people)
I have never seen Mother Russia though. Until this day it is cast in pure studio magic.