I consider myself pretty immune from picking up on trends because I don't watch TV, go to the movies, or listen to pop radio.
I can usually size up a fruitcake on sight and avoid ones I won't like.
Sometimes a song like "Achy Breaky Heart" gets too much prominence too quickly, or maybe it's really more of a dance vehicle than a musical performance, and there's a sort of delayed reaction, "Hmm, good beat, but the lyrics are kind of lame – why did I like this so much?"
Never saw "Titanic" – but I think, like "Jaws", it's become ingrained in our culture. I've seen clips and heard people describing scenes which must have been memorable even if the movie as a whole may have been more of a box-office smash rather than an artistic triumph.