Is it normal that i enjoy nightmares?

It may be the confusion between very vivid dreams and nightmares. Vivid dreams don't have to be horribly unpleasant, they're just extremely interesting and bizarre, and some of the ones I've had are very fascinating and I love them myself. I think the op was confusing them with nightmares. I've woken up sweating from some very vivid dreams that I've had also, because they're so fascinatingly strange and I wake up and still remember them well for a while after waking up, I'm pinned to my bed, sometimes sweating, I can't stop thinking about them, but I like it. That's what separates those dreams from much less vivid dreams that you just remember vaguely when you wake up from them. With them, I only remember a few seconds of them and it's hazy, that's just not so fascinating. I don't get the fascinating vivid dreams so much anymore, I think it's because I smoke, I've read that smoking kills vivid dreams. I better quit so I can start getting them back

That's fallacious...