I like the following shows:

Supernatural

Doctor Who

Sherlock

Merlin

Teen Wolf

Arrow

The Blacklist

Californication

The game of thrones

Revolution

Grimm

Sleepy Hollow

Big Bang Theory

...

I suggest you to register on page like

http://www.synopsi.tv/

or

https://nextseries.eu/

and rate all TV Shows you watched. Base on this ratings they suggest you sommethig relevant for you.

(Sometimes you must wait 1 day while their algorithm calculate your suggestions. So be patient.)

Dexter

TVD

Grimm

Hannibal

Hemlock Grove

Bates Motel

Buffy the Vampire Slayer, Angel, Firefly, and Dollhouse

Elementary

True Blood

"Death note" it's an anime, you won't be dissappointed

I like the following shows:

Supernatural

Doctor Who

Sherlock

Merlin

Teen Wolf