Ripple
Hades rather liked the fact that he could pretty much do whatever he wanted in the Underworld without causing too much of commotion in the Upperworld.
His dear brothers had to keep themselves in line because if Poseidon or Zeus got angry, they made, well, ripples through everything else, upsetting everything. Except the Underworld.
It meant he got to see the two fight with each other extremely often, which was always a plus.
Hades liked to think of the Underworld as something like the River Styx, flowing uninterrupted until some stupid demigod decides to jump in and interrupt the peace.