I have to be unoriginal here and say this was my favorite line, too: “Marry me...you bastard?”
It's just so... Snarry. And there is something so satisfying about Snape being both possessive and vulnerable. Love him that way.
I also have to laugh, Ms. Angst, at your warnings about this being fluff. You might be the only one that needs the warning, as I just eat this stuff up (and judging by the comments, it seems you have several other takers, too *grin*). Of course I enjoy angst as well, but sometimes one just needs something fuzzy. :-)