Forgot to elaborate on my answer.
I went with Bretons because the UESP points out that they are very non-homogenous in terms of culture and society, which I find much more appealing than the Nords, who seem largely to have pretty much one set of values, especially since they've turned their noses up at magic (The Skaal being a notable exception, and who completely fascinate me). I need to learn more about Imperials and Redguards, but what I've learned about either of them hasn't been enough to make me jump ships to them yet.
Plus, Bretons value stealth and espionage, things I felt were sorely lacking in terms of quests in Skyrim.
Also, I want to read more about the Bad Man.