My mom reminds me of Membrane when I mention Invader Zim XD
"Oh that little green guy?" <-- never realizes Zim is an alien! She thinks Zim in human disguise and Zim without the disguise are two different people. She's never really sat down and watched it, her english isn't that great (we're all Swedish) and she might not get the humor all the time. My dad understands it but he's more interested in anime (I'M not even an anime fan D: )... thinks cartoons are for kids only =P
My oldest niece (turns 14 in May) goes around ALL THE TIME and quotes Rise of The Zitboy, GIR's "I love you..." to the Pizza delivery boy especially. I don't know why she loves it so much =P