Hmmm. Let's see. I guess it was 1990. I don't remember my first episode, but it must have been from season one during its first run. My strongest emotional attachments were to Brenda Walsh and Dylan McKay, whom I secretly had a crush on. Ahh Brenda and Dylan... I was such a tomboy back then, tagging along with my three older brothers, that I wouldn't admit I cared about such a girly show.
Come to think of it, I had to negotiate with my mom so that she would let me watch it at all. She said that it was too adult. In hindsight, she was probably right, and the PSA-like early episodes fed me information about sex, birth control, and a woman's right to choose that I was too young to fully understand. Years after viewing "Everybody's Talkin' 'Bout It", I was still thinking about Andrea's condom crusade versus the parents' push for abstinence.
Well, I cried a lot during season 3, specifically when Dylan chose Kelly. It crushed me, and I vowed not to watch the show again. Of course, I still watched but not as often. The magic was gone, and I stopped tuning in altogether after Brenda left. Then I saw commercials for the Dylan-Toni love story, and their relationship temporarily brought me back in. I abandoned ship once again after Dylan left, but I did catch the odd episode here and there.
It's only with the recent release of the seasons on DVD and my discovery of online episodes that I've been able to reacquaint myself with marathon sessions. I'm still catching up on some of the later episodes that I was once too bitter to watch, and I feel like I'm falling in love with 90210 all over again.