Do you know what a "gateway" band is? It's a band that opened a door for you musically to other bands or styles of music that you maybe never knew existed or knew they existed but was unfamiliar with their music. When I was a kid AC/DC was my "gateway" band to all things heavy and evil. I am forever indebted to them and this album is one of the reasons why.
I'll be the first to admit that Fly On The Wall is not AC/DC's strongest album. I wouldn't even put it in the top five. However along with Back In Black, Flick of the Switch and the Maximum Overdrive soundtrack it was one of the first AC/DC albums I bought with my own money. My brother and I listened to AC/DC endlessly when we were kids and through their music, the magazines who's covers they graced and fellow fans it was these albums that opened up an entire world of metal and hard rock that I had no idea existed (or existed before my time).
With that said, it's still a classic hard rock album and I'd put songs like "Sink The Pink" (if only I knew as a kid what the hell they were talking about...) and "Shake Your Foundations" up against any other Brian Johnson-era tracks. Originally released in 1985 it's the tenth studio album (ninth here in the States) and really the true beauty of this album is that while the rest of the mainstream hard rock world was getting out their eyeliner and hair spray and starting to perfect weepy power ballads, AC/DC was still crushing skulls. This album is highly recommended for anyone who calls themselves a fan of rock n' roll.