I've had cats my whole life and have never had one drool, especially to the level this cat does. He's constantly dripping from his mouth when he's content and meowing. But then he loves to cuddle up next to me, with his head buried in my armpit and as he kneads my neck and falls asleep, he leaves a huge drool stain on my shirt.
I don't know if it's just him or if it's common for his breed. I think he's a nebelung.