The biggest value gain from Reddit, to me, is the ability to centralize effectively around different hobbies and activities. In the past, if you wanted to find an online community for a movie or a game, you had to find a forum for that community. Finding forums that are well managed and capture a good segment of the community is hard -- and Reddit just becomes a default place to look now.<p>Let's say a new TV show starts airing, and you really like it and want to discuss it more. You can probably bet there's a subreddit for it, and in that community, a ton of people interested in it. You can bet there are threads for discussing it in other parts of Reddit too. Worst case, you can make one yourself.<p>This is something that everyone has in common. Everyone has a community they want to "be apart of" and Reddit lets you express yourself to those communities without having an identity tied to that community. There are groups on Facebook, but it's so tied to you that it's hard to just be a part of a community. On Twitter, people tend to congregate around others in their interest domain, but by default, all posts go everywhere. Someone into a show on Twitter is going to dilute their feed and have a similarly diluted feed if they discuss it. In contrast, a subreddit is a concentrated mass of people around a topic.<p>I don't really get much value outside of this centralization. The default subreddits are too general for my taste, so I don't subscribe to many. But for the 80-90 different topics and communities I like to see, it's great.