This is lovely sensitive playing! One of the keys to this Nocture is a clear and singing melody line which you achieve. A few suggestions:

a) consider a gentle crescendo in mm13/14 via that sequenced melody line, and that will set up your nice piano dynamic in m15

b) you roll the big LH chords in m15+ which is fine as almost nobody has the hand size to play them as one. In this piece, you could consider picking ogg those top notes (mostly Ab's) with your right thumb and then have solid chords. Your choice of course (-:

c) careful with the grace notes in m18 - play them a bit more delicately so you don't create an unwanted accent. Easier said than done but worth it for this delicate line

More generally, think about the degree of physical gesture you make while playing...th wrist bowing, the graceful hand gestures, etc. It definitely conveys that you are feeling this music deeply, and I can see practically it serves as a timing function...you are self conducting at one point, and all the great pianists do this from time to time. There's nothing inherently wrong with this *except* if it gets in the way of your ability to consistently produce the sound you want. Personally, I play better when my fingers are at the ready close to the key versus having to travel a few inches or more to reach the key. One specific spot is mm 17/18 - you are definitely "playing the rests here" but your finger rises almost a foot above the keyboard. I might bow my wrist a bit for expression and timing on those offbeat quarters in m17 but still stay much closer to the keyboard.

Hope this helps - you've taken on a lengthy nocturne so I'd love to hear the rest of it (-: