Have any of you meet your "evil" side?

I had a dream where I knew I was dreaming but was just along for the ride. I went into a building to rescue some hostages (similar to a show I had just watched). When I encountered the hostage taker I saw that I was the hostage taker and all of a sudden it seemed like a better idea to see who could shoot more hostages. It made sense at the time but after waking up I wondered if this is semi common. Next time I think I would like to gain some control of the dream and fight my "evil" side instead of joining him :)

I'm not sure what you mean by "evil side." Are you suggesting some Jekyll and Hyde nature in all humans, where there is a good personality and an evil personality?

Oh, oh oh! This one was fun, I remember someone claiming to be my evil side, they looked the same as me, but it made me laugh so much that I nearly lost the dream "Yeah right, you can't be the evil one, because I'm the evil one..." then proceed to kill.

Yes! It was exactly like that. As soon as we meet I needed to one-up him :)