Today's genre is a bit different than usual, because it's a type I just made today (Sunday)! More specifically, the idea for this ruleset came while playing with a different genre called Quarry. This type, from michael3.14 in the CTC server, has the same rules for black and white squares, but also permitted unclued regions which satisfied certain properties. These unclued regions felt tough to force because of the way the white circles work. What if we removed the unclued regions, then, and loosened the remaining rules a bit?
This is what I came up with. It may not be in the spirit of the Spotlight series, but I spent enough time constructing these (and fixing some uniqueness issues in my first attempt) that I felt it was worth posting.
Rules: Divide the puzzle surface into rectangles, each containing exactly two circles. Black circles must be located in a corner of their region. White circles must not be located in a corner of their region. Gray circles may be of either color.