Do you often have dreams in which you're acting completely out of character?

I think that we've all had a dream where the unexpected happened, so it isn't a cause for concern (if you're feeling that way).

Heck, I'm usually a passive person -- only assertive when the time calls -- but sometimes I have dreams of beating someone. Now I know that violence is never the answer, but I think that you feel compelled to do these things because it's a sort of outlet. If you're having lucid dreaming, where you know you're awake, you think that you can do whatever you want to. I think that it's all okay, just as long as you don't do bad things in real life (such as the assassin thing you told me about). Alright, it's common sense, but some people may think that it's alright after the dream.

So, in other words, I wouldn't worry about anything like that. Maybe you're thinking about something like that more often before going to bed, or maybe there's a deeper meaning within it. You can believe whatever you want to.