I think we are all guilty of picking form over function from time to time: we all want a bike that looks good. However, I personally feel that when aesthetics interfere with safety or cause severe discomfort, then some line has been crossed. My bike might look a lot better without breaks and a rack, but then I would have trouble stopping myself and the loads of crap I have to carry in my panniers for work. And never forget that the only person who really cares what your bike looks like is you!