How do you come up with the traits/bonds/ideals/flaws for your backgrounds? it's something i've always found difficult when trying to homebrew my own.
I think my approach really comes from this perspective of “what are the different kinds of person who would have had/chosen this life,” or alternatively, “what would this kind of life do to someone?”
so, idk, let’s imagine a background called the Scribe. The Scribe background might be similar to the Sage, but it’s not as reclusive--instead, the Scribe travels around documenting the stories of people, or maybe one specific person. You know, we go through all the other steps, and we get to those personality tables.
Traits are 1d8, so they can seem a little daunting.
But okay, a Scribe as I’ve described them here might be a sociable person who loves drawing little details out from their interviewee(s), or maybe they’re standoffish because of the prestige of their job. Are they stubborn truth-seekers, are they enthusiastic storytellers?
Well, those are four different traits right there. Traits are best described as ways the PC will interact with other characters as a general rule. It’s sort of a core feature of their personality. The other three--Bonds, Ideals, and Flaws--are best described as exceptions to that rule. When a PC runs into a situation that connects to these other aspects of personality, those aspects will make them change their behavior.
Flaws are great, because they’re weaknesses that, as I’ve said before, are also assets. Writing a good flaw means not shying away from the bad part: most players will pick up the good side naturally. For our Scribe, let’s see. An interesting Scribe flaw might be that they’re gullible: who would lie to a record-keeper? So they believe all sorts of tall tales and made-up legends. This can translate in mechanical terms to a low insight score, but it doesn’t have to: this might just be a character’s blind spot. Or instead, the Scribe could be secretive, if the records they keep are for a private or exclusive institution, and they hesitate to share vital information.
Bonds tie a character’s present to their past or future; unfinished business, lingering emotional stakes, or a goal of some kind. These can be the most backstory-ish elements of the background, so they make a good jumping-off point for a complicated relationship. Perhaps the Scribe used to chronicle the adventures of a hero they were in love with, but when the hero rejected them, they started tearing the hero’s reputation apart. Maybe the Scribe fears being forgotten after death, and works tirelessly to become a legend in their own right--as someone who records the lives of mythical people, it’s easy to see how they could end up being obsessed with their own legacy.
Ideals are in some ways the easiest one of these because there’s a simple formula to use: one is Good, one is Evil, one is Chaotic, one is Lawful, one is Neutral, and one could be any alignment. Regardless of your actual feelings on alignment, I think the Ideals section is the best way to use alignment. An Evil Scribe may believe that to be successful, you have to ruin someone else’s reputation. A Lawful Scribe might believe the most valuable thing in the world is honesty--brutal honesty, sometimes, but to tell the whole truth and nothing but the truth. A character’s ideals are a guiding code for their actions. They might judge others by their code, choose to live-and-let-live, or even have a hard time living up to their own expectations for themself.
Ideals and Bonds are motivators-- they’re reasons for doing what you’re doing. Traits and Flaws are characteristics--the way you are, as shaped by your life experiences.