Well, it took a while, but I finally moved away from starting all my counterpoint at the octave. Not many of these little sketches are in 4/4. It makes the measures too long for my little five-minute exercises. (click on image to enlarge)
Using a single repeating note as a motif isn't anything new -- but it did give some idea on where this might go next. As I was copying this from the original sketch, I could remember -- even after two years -- where I wanted to go next. But you may have other ideas.