I am nothing if not a completionist. I've made 2 Gryffindors and a Slytherin. I'll be darned if I don't complete the set!!
I used a nice fat yarn and it's outrageously soft. I'm totally a fan of Micheal's house brand "Loops and Threads" If you have a Micheals craft center near you, give the brand a try. It's much softer, much less pilling, and just as machine washable as you'd imagine.