I have had to really think about this before replying because I have had a very good year and added more than a few of my much wanted items. But the best I can do is knock the list down to these 3, and in no particular order.
Current PRVC/FANY beret badge
Three different versions of the 207 General Hospital patch
The white version of the TMW DARTS patch
I've added lots of others, but these are my gems!
Terry