Well, squee! I'm so happy you like the fic! I wanted to write bottom!Snape since it was first on your list - and, well, because Muse kind of pounced and pointed out how nicely a de-aged plot would work. ;)
And then, of course, I didn't have much time to worry whether I would be able to do Severus justice - because he walked in and completely took over. :D He was a delight to write. And, well, the whole story was a delight to write, and I'm very glad you enjoyed it, even though it wasn't anything close to your prompts/suggestions.