But, there are a few quests that you’ll only be able to experience if you’re running with a character that has an origin story. Now, mind you, there aren’t many quests locked behind characters with origin stories. However, it does play a pivotal part in how you as a character approach the story, as well as what kind of quests you’ll be able to partake in.
Choosing whether or not you make a customer character, or run a character with an origin story, doesn’t really change the player experience in Divinity: Original Sin 2.