First four albums or so are full of great stuff - although all you really need is an early Greatest Hits collection. Their comeback material in the 80's/90's was obviously fluff, but as slabs of cheesy poppy goodness goes, you can't really beat the likes of "Janie's got a Gun" or such like. I enjoy it the same way I enjoy Def Leppard, which is: not at all, but it's still fun.