A favorite pattern is the Hitchhiker by Martina Behm. I have knitted it once, what a great pattern. It's long, and has little 'teeth' up one side. A nod towards the Hitchiker's Guide To The Galaxy.
If you can knit, purl, kfb you've got it made. You can use any wool, or needle. I prefer to stick with the smaller 2.5 needles...These are easy stitches. The only hassle is remembering which row you're on. Which isn't hard, with a stitch counter. The pattern is probably one of the most knitted, Ravelry says there's 19,500 projects made! I love that about Ravelry-they show the pattern, and examples of it made. You can filter to see handspun yarn and much more.
So when, I mentioned I was up for knitting another scarf...I asked my daughter "what pattern" she answered: Hitchiker! So I find myself casting on again :)