I find A Matter of Life And Death to be the weakest Maiden album remaining. Very heavy album but also slow and plodding. Tracks like Different World, The Pilgrim, Out of The Shadows, The Reincarnation of Benjamin Breeg and For The Greater Good...Doesn't do much for me anymore.
The rest of the Maiden albums are all intense and highly enjoyable albums from start to finish.
Oh and I voted against Sad Wings because I feel it is too uneven. It has three fantastic songs. Victim, Ripper, Tyrant and then a lot of forgettable tracks and the worst track they ever did in Epitaph.