I don’t like the idea that people can’t see my earlier writings. That’s important to me, especially if I don’t share stuff often and I put effort into it. I don’t see the benefit in hiding that from my friends.
What I’m looking for these days is actual community, conversation, and connection. I think the effortless posting on Facebook/Twitter encourages kneejerk garbage (and blogs, sadly, have fallen into decline) so I really like the more “slow down and make something meaningful” philosophy here. If you can turn that into an actual community—one that offers something Reddit doesn’t—I’d pay for that.