Interesting how you put Don't Shoot Shotgun together with Run Riot, I always put Run Riot together in my mind with an song from Pyromania, Stagefright. Listen to the two back to back, and even though their a few years apart, sound connected.

Neater than it sounds
The thing with Def Leppard is they're a little more crafty than they sound. The songs on Hysteria are filled with stuff you wouldn't expect and because of well it's done, don't even notice. Like all the key changes. One could do worse than to use Hysteria as a how to guide on how to write songs.