Because I love to be creative. Writing for an RP is like an interactive story. There are so many unknown variables you can’t account for like you can writing alone. It keeps things interesting because you can’t always predict what that other person might say or do. An then you have to think of how your character is going to respond to whatever happened. Sometimes it’s easy an other times it makes you really stop an think. I enjoy writing stories with others. It’s just way more fun then writing alone.