Advice/Criticism for my city villa

Well... how steep is the slope? The house doesn't look like it's on a slope.

I keep wondering why it's so difficult to first read up a bit in forums and then actually do the sensible, specially pinned things.

The bay windows look visually out of place.

Spelling and grammar? - yes, the dormers look visually out of place. To meet the request, a classic mansard roof would seem more appropriate here.