Yes, I've played some of DS1 and a little of DS2 and they both scare the hell out of me lol. If you like games where you have a constant feeling that something will (and does) jump out at you, or running for a door with 'something' coming after you and getting there just in time, then you'll enjoy them.
Ok cool. Can I ask why you didn't finish the games? Did you get bored with the gameplay or story?