I remember trying to watch it back in its earlier days, when Shannen Doherty was around. For some reason, the show never appealed to me.
Since Rose McGowan took over her spot, I decided to give it another chance and now I am hooked! What a difference one person makes. The characters are appealing, the storylines are compelling, and the sense of urgency just draws you in.
Probably the best part of the storyline was where the Source (of all evil) was masquerading as one of the main protanist's lover, and no one else knew about it. How could the antagonist screw that up?
I can honestly say that "Charmed" is now the best fantasy show on TV right now, better than such shows as Buffy the Vampire Slayer, Angel, & Dark Angel.
For those who don't know what I am talking about, maybe this link can help (sorry I couldn't find a better one):
http://www.thecharmedones.com/