For a simple arpeggiation, you show just how well you handle chords. I love good chord progressions, and I can tell a good one when I hear it. There's also a bit of a quirky, and at once melancholic, feel. I was actually thinking of a melody to go on top of this, the whole time listening to it.
No doubt, I imagine that if I used it, I would build it up with lyrics, and maybe a few things. Don't know if I will, but that's beside the point.