I'm not really a person who wears vests that much, but I feel I could use one for work. I cannot turn up looking like a student who's come dressed ready for the next party. I need to look more like "look I've just been to the library"-type. So far I've found this Honeycomb vest by Sarah Castor. This is sooo the library type.
My other choice would be Back-to-school Vest by Stefanie Japel. I've been dying to knit one of Stefanie's designs ever since I got her book. And this looks like a simple pattern to start off.