I am knitting lots of hats lately. They are instant gratification projects.
This is Eno by Jared Flood. Knitted with Lang Yarn Merino 150 and 3 and 3.5 mm needles. I used 1.3 skeins.
This is my Baa-Ble hat, free pattern from Donna Smith. I knitted it with Drops Nepal from my stash using 3 and 4 mm needles. Only knitted 12 rounds for the ribbing.