I've got a soft spot for all materials.
Titanium, spyderco's frn, bone, and micarta are my faves.
I want micarta on fixed blades, bone on traditionals, and either titanium or frn on folders. I have nothing sgaindt g10 and most of my knives are made of it. But titanium really gets me. If I want light weight than frn all day.
Most used lately: SE Jazz Delica, Police 4, Chaparral Titanium, Slsyz Bowie