I have fonder memories of Dark Souls 1 because it was the first one I played and therefore my introduction to the series. It felt like a different experience as I went through it and got rekt and enjoyed every moment. The sense of awe, if you will. That being said, I did enjoy the second one as well, it just didn't hit me as hard since I had already spent so much time playing the first one (and getting 1000 gamerscore.)