Some of my dreams are lucid. However, I can't control them much further than killing myself. That's right. I kill myself in my dreams. Usually by jumping of balconies. Not at all an unpleasant experience, mind you. Now, hopefully, when I hit the ground, I wake up, but there have been times where I just respawn somewhere else in the same dream. (This was before I started playing Quake 3, of which I've also dreamt.) Another thing about them - they're always at night, somewhere in my town.
I've dreamt I was programming (On numerous occasions), dreamt of some of you hexusites, as well as others I chat to online. Then again, I do use computers for more than 56 hours a week. :>
As for having the same dream more than once, there's only one, basically the only nightmare I have anymore. Been having it for as long as I can remember. Though, throughout my lifetime, I've only had it 8 or so times. Weird, that one.