I've seen this discussion come up before.

The outcome of the past threads has been if we scale the model so that it travels the same number of fuselage lengths per unit of time between the small and big ones then the model becomes almost silly light and slow flying. You end up with a P-51 that is flying at speeds which make it look like a J3 Cub. If the model is scaled for weight such that it mimics the behaviour in turns and other maneuvers of the big ones then it's flying too fast to look scale. So the J3 Cub ends up looking like a P-51 for flying speed.

The happy middle ground seems to be make it light enough to fly in between the "scale speed" and the "scale behaviour speed" and just doctor the maneuvers with a bit of control input to make them look "right". Which side of this you run closest to depends on your own tastes and the sort of model you've built. Fast flying full size designs tend to look better in the air when they operate closer to the scale behaviour weight and speed while slow flying full size craft when modeled tend to look better when kept closer to the scale speed weight.