The most obvious question is... what was the audition piece? ;-)

I think I enjoyed the third season of Sherlock, assuming I'm remembering correctly which one it is (John's wedding and its aftermath); the Christmas special was cleverly done, especially in the way they managed to tie up the obvious inconsistencies between the past and present canons (e.g. Moriarty). I remember feeling a bit dissatisfied with the ending's not seeming terribly relevant to the present-day scenario, but I don't remember how or why -- not being a dedicated Fan, I don't purchase, download or rewatch these things but just see them as one-offs at the time of broadcast.
The main trouble with making a conscious decision not to watch something is that it pretty much includes an inherent choice not to watch any more of it in the future. Although I've managed to miss the season finales to several series of Doctor Who over the last few years without ending up irretrievably confused ;-p