Merlin strikes me as something that I'll probably take to watching on DVD a few years down the road, when my curiosity finally outweighs my dismay at its inaccuracies. The few bits I caught on Syfy when we first got cable (and everything was New and Sparkly!) did not impress me in the slightest.
Buffy is something I kinda want to start watching, though.
It seems that way to me too. I love A.S.H (I can't be bothered always typing his full name) but the series looked a little too irritating from the bits that I have watched so far.
Buffy and Angel- I have them all. I love them. A.S.H is brilliant in Buffy, and Angel was a really good spin off. The cross overs were done well, too.