Toonami. I can't remember the first episode I saw, but I remember watching Jupiter's debut episode, the SuperS movie, and some of the S/SuperS seasons. Even back then, I thought Serena's voice sounded just weird in those episodes... I was around 6. I saw the commercial for the Irwin dolls, and asked for the Sailor Scouts for Christmas in 2000. I got Sailor Moon and Tuxedo Mask. I didn't seriously watch the show until about 10 years ago though when I got more hardcore into anime.
Sailor Moon was one of the very first anime I saw, along with Tenchi Universe, Dragon Ball Z, Gundam Wing, Outlaw Star, Pokemon, etc.