In my opinion, Achtung Baby may have been U2's greatest of all time and certainly one of the best albums even released by any rock band.
Achting Baby was recorded at a time when the band was at it's weakest moment and was in danger of breaking up. It was until a small demo of 'One' was played for the rest of the band it was a complete 180 from there.
There is a lot of emotion in the album and you can fell when playing back the tracks. You'll feel pumped and engerized at one moment, then brought down feeling true emotion from 'One' and 'Wild Horse'.
Friends, if you've never listened to a U2 album, make Achtung Baby your first. It's was awesome in 1991 and a true classic in 2013. I can never get tired of this album, one of my all time favourites!