I don't understand why people think this series is average, boring or crap. I've heard people saying that they didn't find it funny, and since it's a "comedy" anime it simply fails.
But I can't remember the last time I found a horror movie to be horrifying and I enjoy them more than anyone else.
You shouldn't hate on something just because it might not deliver what you expect to get from it.
I don't remember laughing too many times during this series but it still remains one of my favourites.