Three more hats.
I think this is more Lorna's Lace, but not producing quite the same nice spiral. Also, I tried to apply some new pattern, I'm not totally sure what, and as you can see I executed the pattern successfully but I can't say it produced a nice hat.
Here's a reversion to simple 2x2 ribbing, but with a nicely colored yarn which I didn't quite keep good track of so I can't tell you what it was.
And here's one that I think came out okay: a "bamboo" pattern from my Vogue pattern book. This is the Karabella Aurora 8 again.