Never seen any of it. Is this a show where I can watch in release order, or are there prequel movies and flashback episodes and stuff that need to be reordered?
Also, is there a difference depending on where you watch it? Some shows have censored episodes, removed jokes, or of-the-moment "special"episodes. (Like The West Wing’s 9/11 episode)
There are some Angel crossovers that are literally one episode across two shows. It might be a bit jarring to watch those separately. I believe they only lasted one or two season before buffy moved networks though.