Three main points on aesthetic sense: naturalness (自然さ shizensa); honest/unaffectedness (素直さ sunaosa); tranquility (安らか yasurakasa). In other words, arrange the materials in a natural manner, respecting their given character to create a tranquil feeling.
NIKON D40 using 18-70mm f/3.5-4.5 lens at 70.0mm
1/60s f/4.5
IS0 200