I love collecting PCGS slabbed Jefferson nickels. I only collect from 1938-1945 though. I easily completed my set of PCGS MS66's and have tried upgrading some with full steps as I can afford. I recently started to add a twist to my collection. I started replacing my set with MS66+ grades. My first one was a 1939 D MS66+ with a population of 1. This could be a difficult task as some dates only have 1-3 total graded as plus. It's been fun starting this. Probably overpaying for some and may not be as good as getting all FS designations, but at least my set will LOOK FLASHY! Anyone else actively seeking out plus grades for any denomination?
You can have a one of a kind set if that is what you desire. But first you must attract enough wealth to support this desire.