I celebrate simplicity in tanks- especially the aspect of overcoming the urge to cram in color and activity. Giving fish their space to grow and explore is great. A lot of fish in a more "empty" system seem to eventually take advantage of a lack of competitors and a surplus of personal nooks and crannies to make into territories. It's fascinating to watch them develop this behavior over time. In the long run, it also saves money on food and medication, as well as less water changes need to be performed. (although I generally support a 10% weekly water change for most systems, regardless of how many fish are in it.)