The worst thing a fat guy can do is watch the Food Network.
There is one show, however, that I can't miss.
Alton Brown's Good Eats is the greatest foods show ever. It has the right combination of Tastiness and Nerdiness that just seems to strike the right note with me.
It's like watching the perfect balance of Science and Home Ec. (Except that there are no goggles involved.)
I PVR it, so I can watch whenever I have a chance. I try not to watch on an empty stomach though - that's just torture.