I think it's just what you like..
I've noticed that a lot of times the blocks of color don't give a very good look to how the yarn will look wound up.. and the hanks are not as pretty.. on KG they showed it on skein winder.. she first put it on a swift then spun it on to the skien winder.. this lines up the blocks of color better and shows you how the pattern will work out.. more.. I've been thinking of getting a Niddy Noddy cause the skein winder thing is about 80.00.. this way I can also buy cones of yarn and use the noddy to get the yardage I need.. but right now I'm just winding it in cakes cause I think it looks better than the chunky blocks
My green, lilac, and blue looked ugly.. I mean ugly when it was drying.. dh was like umm.. hun.. why don't you just stick to solids
he was even amazed how pretty it turned out when I wound it up...