I've never knit a hat, but I could happily crochet hats until the cows come home! Man do I love crochetting hats. It's actually becoming a problem because it only takes me 3-4 hours to make one, so I'm running out of uses for the hats. All my friends are getting them this Christmas/Hanukkah.
I keep meaning to learn how to knit a hat, but I have this terrible fear that it won't be nearly as satisfying.