The most obscure set that I am working on is the E210-2 York Caramels (type 2) I love these cards. (I do have the full Type-1 version)
I haven't been searching very much for them lately, but I do have 54/60. Not bad
The ODDEST thing I am working on is my existing 17 full sets of 1971 Topps Football. I have 21 more "mostly complete" sets in binders too. A few more low grade Bradshaw RC's to go. So that's 38 sets and I have a couple thousand more to put in the sheets some day.