Yes, Post Doc is one of my favorite breweries. Excellent beer and one of the most innovative/creative I've come across. I also lived in Snohomish for several years - that's where my wife and I were married.
As to the actual theme of this thread... I brew because brewing combines art and science in the form of a beverage that I and others really enjoy.
That and it is a quest for perfection. I have the idea in my head about what I want the beer to be, and I just keep working on it. Sometimes I achieve what i'm going for. IPA's are one of my two favorite styles and the hardest style for me to master, but I'm zeroing in.