I am into anything to do with ghosts and the paranormal.
Ghost Hunters is great. I watch it every time it's on.

. They always try to look for a rational explanation first or try to debunk stuff before considering that it could be paranormal.
I used to watch Most Haunted when it first started as there was no other ghost programme like it in the UK at the time but i haven't watched it for ages and ages. It got to the point where everything seem to be overdone or look staged (to me anyway).
Ghost Hunters International is good too. They did show series 1 in the UK but not series 2 yet although you can see episodes from series 2 on youtube if you can't wait like me

.
My favourite at the moment though is Ghost Adventures. It's brilliant!. They really try to provoke the the spirits and ghosts by virtually try to pick fights with the ghosts to try and get them to make noises or to attack them. It could seem a bit disrespectful but it really does work more often than not.
They are halfway through their second series at the moment in the US. It has not been shown in the UK yet but my brother saw an episode a few months ago whilst on holiday in the US.
I looked for it on youtube and was immediately hooked.
The place that i watch all these on youtube is called paranormrus1. Just type in paranormrus1 in the search box and then click on paranormrus1 next to the ghost and that will take you to the channel page.
There are over 3,000 videos on there including all the episodes of Ghost Hunters, Ghost Hunters International, Ghost Adventures, Paranormal State, Most Haunted and other paranormal shows.