I suppose to each his own my friend. What made DS creepy to me were the noises. The whispers in the music, the clanking of metal and roars of Necromorphs in the distance etc. I'll admit though DS did rely on alot of cat scares too at times.
The only SH game I found creepy was SH2 when you first get into town and theres all the fog and in the distance you can see those creatures that look like their trying to get out of a body bag and move around bizarrly, that and when you get close to them the music becomes all static but other than that, the SH games never freaked me out.
As much as I love RE, they're really not overly creepy or scary to me. There are some real intense "oh sh#t!" moments definately like when the dog jumps through the widow in RE1 or the first few times you run into Nemesis in RE3 but those feelings of dread didn't allways last throught the whole game for me like in DS. The RE games (at least the earlier ones) definately make you feel more vulnerable and in certain parts give you a sense of dread but overall I never found the RE games really scary for the most part. The only RE game I felt a constant sense of dread was RE3 and that was because of course, not knowing the next time ol' Nemi is gonna pop his up his pretty little head.