Hats are another thing that be as easy or as difficult as you want them. I've knit two hats recently, but I think my favourite it the Ishbel beret.
I adore the colour of this one! (As a side note, I dyed a bit of yarn last week using tea bags and got a similar colour!) The pattern is the Ishbel beret by Ysolda Teague. The yarn is Shilasdair Luxury 4ply. It has cashmere, camel, angora and merino in it. Definitely a bit of luxury for your head! :) My project page is here.
This was a stash busting hat. The pattern is a free Ravelry download called Sneaky Snakes, and the yarn is Rico Design Essentials Merino Aran. I'm undecided as to whether I'll keep this one, it came out a bit small. I'll try blocking it bigger, and if that doesn't work a giveaway might be in order :) My project page is here.