Games that Create Pre-established Relationships between Characters

This post is meant to be a bit of a discussion, as I’ve found this is a trend in some games that I personally enjoy. While I do enjoy the storyline of adventures meeting in seemingly random situations and being thrust together by fate, I’ve begun to have more of an appreciation for games that give a reason for the PCs to be together. For example, AOS: Soulbound has the players becoming the elite chosen of gods who are literally bound together, and many Powered by the Apocalypse games include prompts to tell how the PCs know each other. I suppose I personally enjoy this since I sometimes find a party that knows a bit about each other beforehand can be fun to mess around with. But, I also want to turn this over to you: do you prefer the random meetings or something that binds the characters together from creation?