Great thread so far!
I, too, chose to attend the only (funded) offer I received: UW Seattle. But even though this was the only funded offer (I was accepted to two other programs, and waitlisted at one--but none with funding), UW was still the best possible choice for me among the programs I applied to. I will be studying 20th and 21st C American literature, with an emphasis in gender, sexuality, and queer studies, and UW has some AMAZING faculty members in those areas. Despite all of this, the decision was somewhat difficult for me to make, as this will be my first big move away from my family (in Southern CA) and I am planning a wedding for November (that is already booked in CA). So there will be lots of flights back home in the coming months, but I knew that the fully funded offer for a guaranteed 4 years at such an amazing university was an opportunity I couldn't let a few flights and missing home get in the way of.
In regards to preparing for starting the program this Fall, I am continuing to brush up on queer theory and relevant literature (I have only been out of school for a year at this point) to have a better sense of texts I might like to work with for my eventual dissertation. I am hoping to create a syllabus of sorts for myself, and begin working through it starting in June when I am done teaching for the current semester at a local CC. I am also brushing up on my foreign language to hopefully be able to test out of the language requirement and not have to take extra coursework for it. And, of course, wedding and moving plans, and all of the associated anxiety/stress.