The first three records were good rock records. Around the time of Hysteria I just got sick of hearing them every second, and I haven't bought anything since Pyro. The first two records are actually albums I'd consider classic though. I wouldn't bother to see them in concert though. Their pop stuff was garbage imho. Some bands do pop well (Cheap Trick, Queen, Alice Cooper, Ramones, KISS, hell even Sabbath in 1976 and 1978) but I though Def Leppard became too "paint by numbers" and sounded like all the other crap in 1988.