Staind is another one of those bands that I adored their first album, and after that I was just kind of like, meh.
Their first album was so hard and heavy and angry, which, when it came out (1999, I believe) was definitely what I needed to listen to to cope with what was happening in my life. Their second album had some good songs, but it seemed like they were starting to mellow out already. (Did they really get all that anger out in just one album?!)
Now, in my opinion, they're just heavily watered down versions of the band they used to be. They're mellow, and whiny, and I just can't stand listening to them anymore.