I finally managed to find words to talk about this story in your journal (as I'm sure you know by now). I love this story. I have it set aside to read again, because it's not the kind of story that I only want to read once.
I have a feeling that this one will kick Let's Pretend out of its slot as my favourite of your stories.
I love that Snape traps himself - for the best of reasons - and remains his own worst enemy after death. And that Harry somehow figures out how to have a relationship with him - overcoming so many obstacles, even Snape's objections and determined absence.