So here's the thing: I'm the only player in our group who writes long, detailed backgrounds, and it's pretty easy for me since I write stories quite often anyway. I've had 3 characters with our current group, which consists of people I've known for years, and we've played together for almost a year now. I've noticed how I'm the only person who has ever asked anything about anyone's character. And when I say that, I mean in the style of being around a campfire and asking, "So how did you learn how to fight like that?" Or something related to their families. I avoid the latter in terms of one player because I know for a fact that the answer is always "uhh..uhmm..I don't know, does that matter?"
I'm absolutely fine with people not writing detailed backstories, but how on earth could I get them to ask something about my character? I already tend to make the weirdest or the most mysterious character I possibly can to make them interested, rather than creating stereotypes, but that doesn't seem to be enough. I'd be absolutely delighted to tell them all about my character's family, how he learned how to use magic and/or weapons, and all that stuff, since I spent all night writing it. It's kind of a bummer to never get to share those stories with anyone other than the DM. For what it's worth he really likes them.