I was going to write a long post about my decision to leave and the factors that went into it, but then I saw this Zen Pencils comic illustrating a Mark Twain quote, which I think sums it up well (minus the shouting boss part, that never happened, and my boss was awesome :-)):
In short, I see moving to Etsy as a great opportunity to work with amazing engineers on a product that is changing the world for the better.
I loved my time at Wayfair, and I will have friends from there for the rest of my life. I learned a huge amount in the last four years, and I think it was the perfect place to start my career. At the end of the day it just felt like the right time to sail away from the safe harbor and explore something new.