I remember playing Buffy The Vampire Slayer with my friend, of course we always fought over who would be the slayer and who would be the vamp. I was about... 10 when the show was on and when I started watching... which is pretty young, I suppose.
And in High School, I would discuss Buffy endlessly with a friend of mine. We actually ended up getting matching Buffy tats two years ago 🙂
And also there's the nostalgia of watching it with my mum. From season 1 to the very last episode. We're close any way, but it was just one more thing for us to have in common.