Though it's by no means a general rule, I've noticed that of the people who joined in season 6 or 7, sometimes also 5, there was negativity about the episodes. It actually got kind of annoying, because while I was riding high on my Newbie Love of All Things Buffy, I ended up beign surrounded by a lot of LJers who hated the episodes and indirectly rained on my parade. Then I got to ignoring all that and I was happy again. :)