I might try to work with the roof color, as doing a color on it rather sounds like a maintenance chore waiting to happen. Changing out the garage door for something a little more ruggedly wood/higher design quality would help a good deal. If you could rework the strapping pieces so they don't look like 3 "M"s, it would help. You might consider doing the white bits in more of a creamy color. It's difficult to tell, but is there some sort of diagonal brick element at the entry? If so, I think I would remove it. Also, if you could upgrade the light post to something a little more substantial, that might be a good added detail, as it is at a focal point of the drive/entry/walkway.