LOL.
M is for my current mudblood status, as well as the "mal foi" I'm famous for.
A is for artistic as well as articulate, AND for the pain in the ARSE I am.
L I'd say LOYALTY. Very important to me. Lucius, too!
F is for the first letter of my favorite cuss word. Won't elaborate! 
O is for the oodles of friends I love to painlessly torture around the clock.
Y is for yammering and yapping, which I spend too much time doing. LOL.
I is for the irresistable wit that I have. Don't take my word for it, though. 
S is for Stacy, I guess. MY real name. Also for SLYTHERIN! And Snape.
H is for Hogwarts, where I can be found most of the time.