I have not yet handled a Z lens. I do love the look and finish of the F-mount 24-70mm f2.8 AFS lens; the metallic black finish, and gold embossed lettering look great to me.
Do you prefer the look of the Z lenses?
...but I like the clean look of the Z lenses, and also the handling. I feel it is smoother than any F lenses I had or still have. I was a bit worried about the focus ring not being directly coupled to the focus (focus by wire) but it woks fine, much better than I expected. Zooming is great, far ahead of any F zoom I ever had my hands on, IMHO.
I also thought I'd miss the distance scale, which my F lenses have, but then I realized that I only used that with my macro lenses and only to set the magnification, and since I still have that on my 60/2.8 G, so that's safe for now.
Other than that, I only have the 24-70S and it's a great lens, very nice IQ and sharp. I thought that going from 9 blades aperture to 7 blades will have some negative effects, but so far I have not seen any, so I guess it doesn't matter.