I love looking at art-work bikes, but anyone who's seen my bikes knows I personally have more of a propensity to remove "details". On the other hand, one set of details important to many of us here can go completely un-noticed by the public at large. Satisfying things like setting up a bike with wheels true and in the same plane as the steer tube and saddle, crank and chain line straight, bearings that neither bind or rock, etcetera, etc... But... since the OP was clearly looking for ideas about styling touches, I have two words. Tab delete.