Totally Dear Prudence, People Are People, KAA, BDC, JLH (yes, excellent songs, but..whew..enough. But, if they are in a club or bar [which is ALMOST NEVER, where I am] I am the happiest person on the planet).
This is a really hard one to answer. Ordinarily I'll only skip tracks if they are "low par" or if they just don't fit the mood when I'm playing stuff. Agree with Kris that some of the more "overplayed" The Cure tracks get skipped. Makes it a bit more appreciated when I see them played live instead