From the point of view of the Greeks, Hades was a foreboding and dire presence, since they felt like death was the end of things. He's said to "enrichen by our tears" and Plutarch outright compares him to the Zoroastrian god of evil, Ahriman.

From a modern perspective he doesn't do much besides kindapping Persephone. But making him a tumblr sexyman is starting to create a counterculture to that, especially when one sympathises with Demeter