Man, I had a lot of those as a kid. And yet somehow I still kept watching them! I know everyone admires Ren & Stimpy for its animation/inventiveness, and as much as I respect it, I could never watch the damn thing. It was just too gross. I also had a thing about CatDog, there was this one ep about teeth that just drove me up the wall. Though, even cartoons I did like had a super-disturbing episode here and there.
As a kid I watched a lot of Russian cartoons and pretty much anything involving claymation/puppets was scaring me. They were just so....ugly. I just couldn't
It's not until Chicken Run that I found out claymation doesn't have to be ugly and weird as hell.