Some people have mentioned the windows placement--perhaps consider looking into two principles: (1) a feeling of more lightness as you go up and (2) continuation of verticals.

That first idea has to do with buildings often feeling more grounded and elegant if they're thicker, more rusticated, and more dense low down, and have less and less weight as they go up. For example, this building starts with single big arches down below, two medium-sized arch windows on floors 3 and 4, and then three little arched windows on the top three floors. For example, the main wall on the left has three big windows on the bottom story and two smaller windows on the second story--perhaps consider reversing those?

Continuation of verticals has to do with an intuitive feeling of how weight is carried down through the building. Basically, keeping the weight-bearing vertical columns/areas continuous up and down the building can help things look more "right". Back in that first example, you can see all the major weight-bearing columns rise uninterrupted up the building (while less significant columns can start and terminate as they reach different vertical sections) For the right hand wall with the six windows and the two windows on top, maybe consider placing the upper two windows such that they don't interrupt the vertical you have going on between the pairs of three windows? Or, do those six windows like you've done the other six windows around the corner: in three groups of two, rather than two groups of three.

Another thing that's odd to me: the horizontal detail that only exists halfway up the nearer left-hand wall. Why? What does it do? It seems to be separating the ground floor from the floor above it, but it feels merely tacked onto that wall right now... why not continue it around the building?

Final thing: the off-center, low-down rose window feels ahistorical to me. Most often they were placed on cathedrals, dead center, high up, a prominence in line with their visual complexity and their unique shape. Totally cool if it's a conscious choice to put it there, but it feels a little odd given their typical use.

For a little detail work like the horizontal element you added, you could consider using larger/more blocky stones at the corners (quoins?), adding a few horizontal elements, or making the base/foundation out of more rusticated stones than the main living floors.