Aww yay you love Cassandra too! I think she's so hilarious.

Favourite Villain? gotta be boring and say the Daleks! They're just iconic and I don't think I'll grow tired of them (though it would be cool if we didn't see them for like a season at least after the 50th)
Least Favourite Villain? uhmm... the Absorbaloff was pretty crap
Favourite Special Episode? guess I'll have to say The Christmas Invasion, it's just a very nostalgic episode for me.