Hades cannot drive. At all. That's part of the reason he gave Nico a zombie chauffeur to drive him around, because not only was Hades too busy to do it, but the man cannot drive for jack shit. He doesn't even know which one is the brake pedal.

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Hades cannot drive. At all. That's part of the reason he gave Nico a zombie chauffeur to drive him around, because not only was Hades too busy to do it, but the man cannot drive for jack shit. He doesn't even know which one is the brake pedal.
Hades's eyes are really light-sensitive due to his ability to see in the dark. The same mechanisms that let him see in pitch darkness make even a cloudy day in the overworld painful to him. He can change it, sacrificing his nightvision to do so, but changing his vision like that is super disorienting and often causes migraines so he usually doesn't.
Hades; What the fuck- are you on drugs or something? Hypnos; I think we both know that this job doesn't pay enough for me to have a drug problem. Hades, who pays Hypnos $10000 a paycheck; How much do mortal drugs fucking cost?!
Every time another god enters Hades's realm, he tells them to enter freely and unafraid. Unless they're in trouble. If he summons someone down and doesn't say "Enter freely and unafraid," they are in DANGER
Hades became Artemis's favourite uncle when she was around seventeen.
One of her hunting dogs, her dogs usually as free-spirited and strong-willed as Artemis is herself, was running amok in Olympus during preparation for a party and causing destruction, and the other gods were tripping over themselves trying to grab it without disturbing Artie (it was her birthday party, first one since she'd claimed her title as Goddess of the Hunt, and she was getting ready.) They were not succeeding. Until Hades arrived.
He watched the scene with amusement for a moment before deciding to help; whistling so sharply that Artie peeked out of her room to see what the source of the sound was, then snapping his fingers by his side and ordering "Here" in a tone of such finality that the dog trotted right over to his side and sat down. He proceeded to call the dog a good girl and scratched her behind the ears, and gave the dog the first genuine smile Artemis had ever seen from him.
When she expressed surprise, he told her that he had "around three" dogs at home (whether Cerberus counts as one dog or three is a matter of constant debate in his house.) Hades loves dogs, he's absolutely a dog person, and he knows how to handle them. Then he handed her a gift, said "Happy Birthday," and left. He wasn't staying for the party- he's never been a social god.
And from that moment on, he's been her favourite.
Hades always seems as though he's looking through people, not at them. Maybe it's in part due to how he tends to look near people or in their general direction, but even when he looks at someone dead-on, even on the very rare occasions he actually looks someone in the eye, he always seems to look through them, never actually at them. It's always kind of freaky, but it's downright terrifying when it combines with how his gaze seems to lay whoever it lands on bare, as though Hades can see their every fault, their every mistake, their every wrong. It's a very weird feeling, feeling as though he's not actually looking at you but also feeling like his gaze tells him everything about you.
It's weird and disconcerting and the others do not like it one bit
Thanatos has committed treason against Hades before. Most commonly via overthrowing his rule and being king of the Underworld without Hades's permission because Hades isn't the a good enough state to be king. It's not exactly a common thing, but it has happened and Thanatos has never been punished for it. Not only does Hades always think he was right to do it, but he also would have no way of retaliating. What is he going to do, run the entire natural order without the literal god of death? Fucking unlikely.
Zeus; *bursts into the room* Maria di Angelo; Who's that?! Hades; He doesn't like me. Hera; *storms in after him* Maria; Who's that?!?! Hades; She doesn't like me either. Poseidon; *literally breaks down the wall to storm in* Maria; Who's THAT?!?! Hades; Let's just assume that everyone here doesn't like me