I was never interested in Buffy, but then I went to Norway to study abroad. After swimming in the lake one evening with my new-found Norwegian friend Linn, she insisted we hurry back to watch Buffy. I wasn't really interested, but after my shower I went to her room to be social. It was the episode A New Man, since Season 4 was on in Norway (I think it was Season 6 in the US).
I told my boyfriend-at-the-time that I had watched it and it was good and he thought I was nuts. I started watching Season 1 with my Norwegian friends, and by the time I got back to the US the BF was hooked on Buffy too. So hooked, in fact, that we caught up to TV during the 7th season! We used to watch four or more episodes a day on the weekends.