Thing is, the RP has become too similar. If you read on the story/bio, you will often find the same thing with differed words but with the same outcome. There is always the same happy beginning and tragic end. If not that you will find the low life person goes to lord of crime or whatever. Some people are not capable to RP something differed, you have to think about this, making a RP is like a writer writs a good book, or a actor acting very good. Look at movies with a actor that plays the same role in every movie, like Jason Statham and an actor that has many roles under his belt, like Leonardo DiCaprio. Statham will never be able to cover such a wide range of different characters, where DiCaprio does with ease.
Is the same here, people can only do one generic RP and even then, they might not be able to do it properly. Writing a good RP is harder than what it seems.
Even the houses RP is almost the same if you look at it. But then again, could be just me.