If you're reading the flagship of the DC Universe, Johns is outright TELLING you which books you shouldn't read. And I don't just mean the Big Six acting like jerks and morons, though they do headline 10 other books. Johns is more direct about these other titles though:
Don't read Justice League International, cuz Batman says they suck.
Don't read Green Arrow, cuz he's so damn needy.
Don't read Stormwatch, cuz the Martian Manhunter is some kind of filthy traitor.
But you know what? Screw all that. There's only one book you really shouldn't read... and that's Justice League.