There are tumblr subcultures that are more like a sequel to LiveJournal, which makes it more meaningful (at least to those users) than just a meme delivery devi

There are tumblr subcultures that are more like a sequel to LiveJournal, which makes it more meaningful (at least to those users) than just a meme delivery device. It also gets some use as sort of an improved Twitter. If you like a post you can, um, Like a post, reblog it as is, or reblog it with a comment of your own. You also get much better options for embedding media easily. Of course, if you don't have any interest in having a LiveJournal and don't want an improved Twitter (with a lower user count), there may still not be any point to you using it.