My fears with CF are more that I've been told (but have no firsthand proof it's more of a problem than other materials) that it's possible to get damage that can severely impair structural integrity but isn't visible to the naked eye (at least I've been told that metals are easier to see bends/rust holes, etc.), and the fact that UV light degrades plastics (so therefore CF?). But that's not the reason I don't own a CF bike. It's more that I'm cheap and I like the looks of lugs and shiny chrome, which limits me to used bikes. I'm not anti-CF by any means, just don't own any bikes made out of it (though one of my old steel bikes does have a CF fork).

When I got my wedding ring a long time ago, I got one made out of Ti because the guy at the jewelry store sold it to me as the strongest metal that had a ring made out of and there was symbolism in that. Plus, it looked badass and I was in my early 20's and that was important to me.

Now, material is material and each serves its purpose.