I own the first three seasons on DVD now. I plan to buy the fourth as soon as I have money (they put the first three on special when the fourth came out, so I got those three. I still don't have the still-at-full-price fourth. So there).
The most fascinating part of the commentaries and stuff, to me anyway, is finding out more about the voice actors, and learning exactly how much they contribute to the show. I'm surprised by exactly how many voices people like Dave Herman and Billy West (Stimpy!) contribute to the show. And, as always, Phil Lamarr fucking rocks in everything he does. "Look deep in your heart and ask yourself... are you funky enough to be a globetrotter? ARE YOU?!" Voice acting is an area in which I suddenly have some interest...
