I did find it SLIGHTLY disturbing that Sam is pretty much a carbon copy of Jack's ex-wife. Or vice versa. I am pretty sure they never planned Jack/Sam out when they first made the series, but sort of recognized the fact that the couple had insane chemistry. And I've wondered if they cast Jack's wife like that because of this.

Haha, and yes, Mulder & Scully are sort of that crazy couple fo-lyfe-yo. I can imagine them living in the Curtis, having their groceries delivered from Loeb's. Their apartment having all black lights with a special light table for Mulder to look at his alien UFO slides on, and Scully has to get him to eat his dinner by calling him on his special walky-talky.