I asked for some advice here a few months back as I embarked on making granny squares for an afghan for my partner. It was a wedding present so it had to be super-good and long-lasting: I used a variety of acrylics for this.
Threw myself into this project with great gusto and finally, after making a couple of hundred squares, I thought the end was in sight. I'm sure experienced afghan makers will be snickering right about now. Took another 24 hours or so to assemble and put a border on. He loves it, though, I'm proud of completing an ambitious project and I have Learned From My Mistakes. Next time, bigger hook, thicker yarn, fewer squares and some kind of pattern!