The only thing I see that stands out is the sky, it is not blue enough, or, smooth enough, the windows are reflecting a really blue sky, and I think it would fit better.
Definitely don't go overboard with the sky though, only enough to match the windows more.
The blue is the kind of blue that is supposed to be kind of a chalky slate blue, I believe, that is way too blue and dark for that, I think. (I can't remember the name of it, its probably "slate blue" though)
I'd cut it back about 50% or so.
The roof's tile/shingles is too much, I think they should be more gray, and not so dark.
The snow looks funny there with all of the green, I'd go ahead and make that green too, and do something with the flowerbeds too.
Usually that would be a good indication that it was all overdone, but in this case, I don't feel it is.
The red in the bricks do look better, more life, and I know there is bricks that reddish, and the same goes for the stone work and the door too.
I like it, but it could be a lot more realistic in my opinion on this stuff.
Of course, I see stuff like this all of the time that people like, so... heh
Randy