Buffy The Vampire Slayer: I wasn't addicted to this until a friend of mine watched it every other time I stayed over. They slowly got me hooked on the unique storyline, & I now own every season. Its a shame they had to bring it to an end. But I suppose everything has to end at some point.
Angel: Spin-off after only 3 seasons on Buffy, I loved Angel better than I did Buffy. Charisma Carpenter was amazing on Angel & her character truly evolved. The only thing I dispised about the Angel series was how they ended it on the amazingly stupid last segment. (with the Dragon & all the creatures coming toward them) Also, this show brought out the big emotion in me. I hated it when Cordy & Angel had their thing never quite meet eye to eye.. & her last moment, in the last season. Also, in the last season, I hated Fred's demise.. but LOVED the new look.
Tru Calling: Its funny how it still ties in with the above two, with the actress who played "Faith" from the above series.. being the lead role in this show. After only one season, & 6 episodes into the 2nd, Fox cancelled it. Originally, I didn't like this show, but my Wife got me hooked. We bought the 1st season.. & thats how I got hooked. It pissed me off when, after I was hooked, they cancel it.
Brisco County Jr.: Are you kidding me, I dispise Westerns, but Bruce Campbell made me love them with this series. I'm still looking to buy the only season they did.. I loved it, never truly seen the ending I don't believe.. unless it ended without an official "ending."