Charmed can actually be a pretty funny show. Not as funny as Buffy, but funny none-the-less.
Paige has lost her voice, so she is communicating via writing on a notepad. She is interrogating a demon the sisters have captured.
Paige (writes): WHERE IS OUR WHITELIGHTER?
Phoebe comes in, and sees what Paige is doing.
Phoebe: Did it ever occur to you that Kazi demons might not be able to read?
Demon (gratefully): I tried to tell her that...
Paige (writes): DEMONS LIE!!
Phoebe: Yes, but not about literacy.
Or some great exchanges between Cole and Phoebe (or Cole and, well, anybody):
Phoebe to Cole: Good people don't turn other people into water coolers!
On another occasion:
Cole: Don't you think you might be a little paranoid?
Phoebe: About my demon ex-husband from hell? No, I don't think so.
Cole trying really hard at the relationship thing:
Cole: Did you get my flowers?
Phoebe: Yeah. "Sorry I tried to strangle you." Probably not a card the florist gets to write everyday.
Or one-liners from the fabulous Piper, who tells it like it is:
-Life isn't a garden so stop being a hoe.
-Be careful of the feet you step on, they may be connected to the boot that kicks your ass.
-Phoebe, you're overreacting. That's my department.