I love my black stainless steel nib in "EF". With its wafer-thin line, I can write notes wonderfully in my small pocket diary.
I prefer to sign with the golden "B" nib, which is built into my Shortcap fountain pen. Wonderfully wide and expressive!
The 18 carat gold nib (bicolour) in "F" writes excellently! All of my expectations were more than met. I can't really tear myself away, I have a hard time stopping writing or seeing enough...