I had a wonderful time at PLDI'12. It was good to see friends and collaborators who are no longer at Princeton. Additionally, it was really good to meet new researchers from around the world, and to discuss the state of the art in our field. It was also very nice that Microsoft Research invited us over one evening.
Beijing was an interesting city. The Summer Palace, Tsingua University and Houhai were my favorite places.
I definitely plan on submitting in November so I can go to PLDI'13 too!