@battleheiz: Nice, you're beginning to top yourself. Very nice collection.
@Maximus: I've had that feeling before. It is just that you feel like you have new expectations so you try to top yourself which takes some of the fun out and then lowers the quality. It is a downward spiral, actually. But if you can relax and keep trying your best without pressure to outdo yourself then you'll start to fell better about your writing.