I really like how that turned out. I've noticed that you "filled in" some of the long note values, a good choice. I would still object (even despite my very modal ears) to the iii chord you use, but it's a minor issue and really depends on what exactly you want
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I think a Bouree or Minuet sounds like a great idea. Though I myself would rather write one of the standard movements... well, if I write a Courante and you write a Minuet, we would be working in similar rhythmic modes, though at different tempos. These dance movements are excellent practice because they can and should involve a little bit of everything: some counterpoint, some homophony; some light two voice imitation, some dense chordal parts, etc... as well as plenty of solid melodies. A great way to practice chromatic harmonies.