I made myself a new vest, and I love it! It is the most simple design and easy to knit piece, but still gives great results.
Yarn: Willow Field in Pebble
Needle Size: US 9 (5.5mm)
Pattern Source: Penny by Elizabeth Smith
I will probably make this vest again, the pattern gives directions to knit with different weights of yarn so it will be easy to match yarns I like with it.