Ares liked to destroy things. He was the tall, strong and cruel god of war.
Hephaestus liked to make things. He was the crippled god of fire and crafts.
Nobody is sure whether he was born lame and thrown away by his disgusted mother or if he was thrown to earth and crippled by his father after breaking up a marital conflict. Either way, hey?
Hobbling around his forge, Hephaestus created armour, thrones and houses for the gods. When Zeus was having hassles with Prometheus, Hephaestus was commissioned to sculpt a woman from dirt. Her name was Pandora and she was given to Prometheus's brother in marriage.
For her dowry, Pandora brought a jar filled with evils. She lifted the lid and afflicted humankind with Hard Work and Sickness.
The only thing left in the jar was Hope.