The Golden Ratio is key to aesthetic design. Although many designers today don't rely much on this concept, but it brings finesse and precise balance to logo designs. The golden ratio shows that there is maths involved in designing a persice logo
Masquerade by Caroline Grohs, is an interesting design, it a photograph with designs over the top. The colour contrast between the red cigarette and black and white of the rest of the design makes it look really amazing.