I really liked these. The first one was nice and dark. I'm going to assume that's Bellatrix, and she gets everything she deserves.
The second one I can definitely see Sev feeling.
The third one was really sweet with Minerva. I always saw them as companionable equals.
The fourth is a little confusing because i can't place the time frame. I think it's during the kids' early Hogwarts' years, but parts of it make me think it's after the Second War.