This is a really hard question. The word 'best' is so ambiguous it almost loses meaning. First of all, how does one define best? The most stunning guitar solo in terms of technique, the most complex guitar solo, the most melodious guitar solo, the catchiest riff, the hardest riff, the longest chorus, the shortest chorus, the most complex chorus, the catchiest chorus, the most intricate structure, the simplest structure, the funniest lyrics, the deepest lyrics, the lyrics that are well-written, the loudest vocals, the softest vocals, the cruelest voice, the gloomiest mood, the happiest mood, the most serious mood, the sincere mood...? Any combination of the afore-mentioned can constitute the 'best' Iron Maiden song. Not to mention personal opinion. Every single person is unique and so are their musical tastes and backgrounds so that one individual might favour the older material while another (like me) prefers those tracks that are most similar to classical music in terms of structure, melody, and instrumental ability. Add to that the factor that tastes and moods change, and the task of choosing a 'best' song becomes nigh on impossible. However, for the sake of quenching curiosity and for educating those who have not looked at multiple Maiden albums and songs, stating which songs are 'best' is invaluable. I found, upon looking at several of the lists, that there might be one or two songs which I should look at again, simply because another has included it in their list of best songs. How is it that we take another person's opinion as law when it is put into a format of 'best of's'? It is an interesting idea to my mind and I think the media have exploited this phenomena quite well. However, enough of that, here is my list of favorites from oldest album to newest:
Phantom of the Opera
Iron Maiden
Charlotte the Harlot
Killers
Murders in the Rue Morgue
Wrathchild
The Prisoner
The Number of the Beast
Run to the Hills
Hallowed Be Thy Name
The Trooper
Aces High (live version)
2 Minutes to Midnight
Powerslave
Rime of the Ancient Mariner
Caught Somewhere in Time
Loneliness of the Long Distance Runner
Alexander the Great
Wasted Years
Moonchild
Infinite Dreams
Can I Play With Madness
Seventh Son of a Seventh Son
The Evil That Men Do
Mother Russia
Bring Your Daughter...To the Slaughter
No Prayer For The Dying
Childhood's End
Wasting Love
Chains of Misery
Fear of the Dark (live version)
Sign Of The Cross
Lord of the Flies
Futureal
Lightning Strikes Twice
The Clansman
When Two Worlds Collide
Don't Look To The Eyes Of A Stranger
Blood Brothers
Brave New World
The Nomad
Out of the Silent Planet
Dream of Mirrors
Dance of Death (live)
Face in the Sand
Montsegur
New Frontier
No More Lies (live)
Paschendale (live)
Rainmaker
Journeyman (live)
Different World
These Colours Don't Run
Brighter Than A Thousand Suns
The Pilgrim
The Longest Day
Out of the Shadows
The Reincarnation of Benjamin Breeg
For the Greater Good of God