Main Characters:
Lawrence - 7/10. I agree with Horo. He's too much of a nice guy.
Horo - 10/10. A delightful character. Witty, greedy, cute and sulky. I agree with the previous posters. She's a breath of relief compared to other heroines I've seen so far. Reminds me of Arcueid. Except that I've come to like Horo better.
Music:
Tabi no Tochuu - a very beautiful and haunting song. loved it on first hearing. 10/10.
Ringo Hiyori - couldn't stand it at first, but something about it made me listen to it more. It's catchy, at least. I did and now I love it. Make sure to listen to the full song. 9/10
ambiance music in the anime - I liked the little pauses. But it wasn't outstanding. 7.5/10.
Storyline:
First arc - It was so so. 7/10.
Second arc - Intriguing. 9/10.
Overall, the first season left me wanting more. So I can't say that it satisfied me enough to warrant it a 10. I gave it a 9/10 for enjoyment.