One thing I will note about 'The Dark Urge' and the concept around it...
I hope when Larian makes DOS3 or BG4 (whatever their next project is) they end up altering the character creation system. I hope they do away with origin characters and instead make more recruitable companions as they seem to take significantly less work. I would rather have more recruitable companions to play along with custom characters than any origin characters.
Then I hope rather than just having a single custom backstory they have multiple dark urge type custom origins to choose from that impact the game as you play. For instance they could have (and these are all very basic)...
The Commoner - There has been nothing particularly special about your life. You are a lowly peasant in the great kingdom - farming, selling wares or raising a family. This is the story of your rise to being a hero or becoming a villain.
The Hero - You are well known throughout the realms as someone who slays evil creatures and helps people. You will be recognized wherever you go. Are you the hero they praise or is their faith in you misguided?
The Pact - You have made a pact with a powerful being to gain great power at the cost of personal freedom. Will you continue to obey the dark creature you are pledged to or break free?
The Dark Urge - Murder urges. Will you give in or resist?