I love the very approachable yet a-bit-unique layout of TWD, the great theme integration in PF design and code (outside of the audio which has been made whole by the community and even better in many regards with all the options), as well as the epic programming. Add to that killer combo a unique as well as rare-adult-oriented theme, and it's my fave.
There are so many different metrics to use when talking about best, not to mention then adding a kaleidoscope of personal preferences. SR and Borg each have their own vibe and both have made some great pins. Cheers on all the great choices