I have most of the frame materials, just recently carbon. No bamboo, no stainless, although I admire 953, partly because it doesn't need paint and is probably the most scratch and damage resistant of all the major frame materials. There are pictures on the steel or titanium thread of a 953 bike that is a jewel. Any frame material that excels at keeping its beauty and freshness and shine, and remains scratch free through the years and the decades gets my attention.

And before someone says that bikes and jewels are totally different, it's clear that many people like their bike frames in much the same way. Beauty matters to them, and scratches are not good points in their minds or perceptions.

I also have a beater that I like precisely because I can be free with it and lean it against all kinds of things, and feel little or no pain when it gets scratched....