I haven't been able to play as much as I want with River (which is mainly my own tagfail and the evils of RL), and that's sad because I adore your River. I think you do a wonderful job of getting inside her head and understanding how she would see the world and respond to it, and then putting that into language that just sounds so River. I really enjoy reading her and I like that you've been playing her for a good while and are still consistent with the way you write.