I must be easy to please. I’m having a difficult time coming up with anything.
And I’ve used a Campy NR two-bolt post for about 40 years and never had a problem. When necessary, I’ve always adjusted it with a 10mm open end wrench.
I suppose I could say single bolt seatposts, since both my bikes have two-bolt seatposts. I won’t accept one that isn’t easily and continuously adjustable.
Otto