I really like Metcalf buildings. They sometimes feel a little over scale for N, but if you’re consistent they don’t look wrong; just don’t mix them with some of the Liddle-End models that look decidedly under-scale 😊(Rye station and Hornby factory spring to mind).
But.. I can’t bring myself to colour the edges in. I know I’m not alone in this as I’ve seen many a photo showing a layout with white-edges to the otherwise normally looking buildings, but I feel I should Grow S