All of these are lovely, melodic pieces! My advice is to always be vigilant to use the best voicings possible; you do this fairly often in your pieces, but then there are some other voicings that could be improved. For example, in Mov't 3 (measure 3) you have written a D7 harmony, but omitted the crucial 3rd of the chord (F#.) Also - even in a form like a minuet, be ambitious and use some full-textured chords! Most parts of these have no more than 3 voices at once, which sounds great with your voicings, but can be even further improved with some added "oomph."
All that nitpicky stuff being said, these are wonderful and stylistic pieces, and you are a very talented composer. Keep up the awesome work!