The question is a little vague, but Hades' kidnapping of Persephone, and the bargain later reached with her mother Demeter, was believed to have caused the seasonal change. If you research these names, perhaps it is the answer you are looking for.
Persephone, his impulsiveness, and his sometimes deceptive nature.
Nothing in Greek myth, he was the aspect of nature that ruled death/the afterlife.
Hades has many wifes, but the most well known is Persephone.
Hades did not do anything 'bad', he was the king of the Underworld and it's deities were dark if not deadly by nature. The only myth that centers him as a 'villain' is that of Persephone's kidnapping.
Yes, there are statues of Hades still standing today; the most popular would be by the artist Gian Lorenzo Bernini. It features Hades gathering up Persephone to take her to the Underworld. See the links below for a photo.
As Demeter's daughter she is a Goddess of nature and life. As Hades' wife and Queen she is the Goddess of the Dead and the Underworld.
See Links
When Hades became assocated with the Christian "Hell", also there is a river Pyriphlegethôn, which was a river of fire. Hades of course, is both the name of the Underworld and the name of its King.
Demeter (mother of Persephone who spend half the year in Hades with her husband, giving us the seasons)
See related links section.
See related links for a good description.
It definitely wasn't Zeus, he was the youngest of the three brothers, Poseidon was the middle child, and Hades was the eldest(oldest) of the three, but they all drew lots and that's how Zeus came to power. Poseidon was quite happy with the sea but Hades hated getting sent to the Underworld---however, it suited his brooding nature.