Wow, who let the shot of Data beaming out at the end of "Pen Pals" through? I've personally done better chromakeying with a handheld camera and some consumer grade software. Data is out of focus and colored incorrectly, the matte is poorly done and fuzzy, and it just looks completely terrible...
That's just like the shot I mentioned from "Q Who?" That looked like it came from a standard def VHS.