Life is too short to knit with shit yarns.
High end yarns please. Or at the least, have separate votes for nice quality yarns that will last, and cheap plastic yarns for cheap hobbies.
ziraI admit that I am such a yarn snob. I'm not extremely accomplished (yet!), but from the hours and hours that I do spend, I want to at least end up with a quality garment, not a piece of plastic junk that will harden over time and shed even more plasticizers into its environment.