I used to watch Ghost Adventures and Ghost Hunters and some of the other similar shows because they seemed plausible for a while and (more importantly, of course!) because my wife liked them. But they both got to be either overly repetitive or just plain overdone to where it was hard to keep watching new episodes. We don't really watch any of those shows anymore.
I'm one of those rare weirdos that believes that nothing is impossible - including ghosts, aliens, and undiscovered beasts. So I approach everything with an open mind and let whatever evidence is available speak for itself, but extraordinary claims require extraordinary evidence and none of the shows on TV have fully convinced me of ghosts, aliens, bigfoot, Nessie, etc., etc., etc.