I'm a sucker for carbon fiber. I liked my Native Chief before, but when I got the S90V/CF version I felt that is the way it should have been period. The CF just gives it that extra something, feels great, looks amazing. My Kapara has really beautiful CF, as well as my Magnitude.
I'm not against other materials. Micarta is pretty good, G10 is probably the best all around, and i don't mind the G10/CF laminate like on my Amalgam or GB2, or like on the Civivi Incite (layered, machined, looks amazing). Even FRN is fine if done well. If I have a choice though, most of the time I'll be choosing CF! Weave, marbled, doesn't matter it just looks cool and feels good, and is light and strong.