Oh, wow! And wow again! And another for writing so well a particularly favoured, yet often under-developed, theme.
This was such a beautiful tale of what life at Hogwarts would have been like for a Severus Snape outside the clutches of Slytherin. I am so glad you steered away from the unlikely premise that in Gryffindor he would have basked in a fan club, develop laughter lines, and have a future of summers scripting Best Man speeches: so unrealistic. What you have created is a subtle twist of location that will, hopefully, bring him a life fulfilled.