自由。那么就从以下概念开始： 你想表现什么？ 记住你的背景和背景故事不同，也不是他的替代品。背景是假想你背景故事给你带来的生活经验的类型代表。 他不是完整的背景故事，而是其一部分。甚至可以说，背景代表着你的背景故事对你的角色有着怎么样的影响——直至冒险开始的今日。换言之，你可以认为背景是“背景故事类型” 或者“背景故事范型”。从心理学的角度上来讲，如果说你的种族给了你特殊的属性值属于先天，那么你的背景给你的特性属于后天培养。（注：原文附了这个链接
以wiki上来说，我们通常更喜欢写在核心规则上的背景：普遍适用，尽管和DMG给的指导意见相反。最主要的原因是，作为公开的可用资源，我们对用这些东西的人的战役设定一无所知！因此，So, in the interests of providing homebrew resources that will actually be useful to your potential audience, try to strip away the setting-specific stuff and present the background in a form which is readily modified and cannibalized into other peoples' games.
This is not as draconian, or as difficult, as it may seem. Take, for example, the Battlesmith (5e Background), which describes a person who was once a member of a dwarven military order called the battlesmiths. There are no examples of this order existing in any official campaign settings, despite it seeming very specific. The thing is, it doesn't limit other races from playing a battlesmith, it doesn't specify any specific locations, characters, or history, and presents the information in a format which would allow the reader to incorporate battlesmiths into their campaign without any further reading. It contains the whole idea, and the idea is as generic as possible, that you could drop this whole concept into any campaign setting that includes dwarves. A really creative DM who still likes the idea, but has no dwarves in his setting, could even just change every instance of the word "dwarf" into some other race, and it would still work just fine! This is what we mean when we say the background should be generic: it should be easy to incorporate it, and its surrounding ideas, into almost any setting. Generic does not mean plain or boring.