I was surprised by how much my decision was based on how badly the program wanted me and not the other way around!
And application procedure-wise, it was an absolute nightmare. I thought my SOP wasn't good enough, my GPA was not high enough, I didn't do enough research about the universities, I applied to way too many ambitious ones, maybe I made a mistake in my Resume. The only thing that quelled my fears was my first admit. At least somebody thought I was good enough to get accept to their program.