If you like vampire / werewolfes type of series I'd recommend watching Teen wolf and true blood. There is also a new post apocaliptic tv series that started 1 or 2 months ago called The 100 and so far i've been watching it. If you like exorcisms and all that scary stuff you should definitely watch supernatural / salem, they're both great series to spend some time on. Also if you like you should watch Da vinci's demons that one of my favorite series.
Hope you have fun ;)