Sorry to be picky but wasn't that Norman Bates?
Apropos Richard Hillman I still smile when I think of Maxime's line as Richard walked towards her with a crowbar "what are you doing with that crowbar Richard" (or words to that effect).
I've quoted quite a few already on other discussions so I won't regurgitate all of them - many from the past few weeks alone - although one of my favourites from the last few weeks has to be Becky's when Violet is being irritable with her. Becky to Ken "slapping a pregnant woman ain't good is it". Oh & Friday's line from Liam after hearing Steve's worries "and do you want me to say stuff back".
I'm sure there'll be plenty more in the weeks to come so I'll keep posting as and when I hear them (or until people get fed up!).