I think he wants them because of the reliability, long life, low power consumption, low heat generation. LEDs beat incandescent in every technological category. The problem is aesthetics - if you are used to the warm look of a glowing filament that is tough to come by with an LED because it doesn't have a filament. The wavelength of light that gives an LED it's color is dependent on so many things: band gap of the p-n junction, materials used, filtering, lenses, etc.

IMO, you have to get over the "obsession" of the look of a glowing filament and be content with a warm white retro or warm white frosted LED to gain all of its technological benefits. For some folks its a no-brainer since they actually like the wide color spectrum and choices LEDs have to offer, for others - they want it as an accurate substitute for the look of an old school incandescent.