I thought they were all very funny, even Scream, but thats only because I saw Scary Movie before I saw it and so it kind of ruined things for me. Scream didn't seem scary anyway as it goes.
When I was younger I was frit scared of Arachnophobia, probably because I'm scared of spiders, even the smallest of them. It's safe to say Arachnophobia didn't help matters.