I really do like yarns with long colour changes. I particularly like using two of them at once to contrast the colour changes against each other.
Kauni, although then it was using just one colourway but starting at two different points of the colour progression.
Noro for this kind of thing.
What I do not love is when lazy yarn manufacturers have knots in the midst of a ball and join the ends together without any attempt to keep the subtle colour change going.
By the way, Noro is the same price here as it is in the UK. I find that really odd. Not that I use it anymore.