No, don't like them at all.
But some bands are a lot worse live. First that comes to mind would be Milli Vanilli.
The main reason for me to buy a Live album is because I want to hear the band improvise. That's why the best live albums are those such as The Allman Brothers' "At Fillmore East" or Wes Montgomery's "Smokin' At The Half Note." I'm not going to buy a live album just to hear the band try to play a song the exact same way they did it in the studio, plus crowd noise. Doesn't make sense to me.