I personally don't care, except for the fact that I own a Plasma, so I have to keep in mind always to no try and burn out my middle pixels while the pixels in my black bars go unused, so I will alternate between stretching 4:3 to 16:9 on occasion. You actually get used to it after 5 mins watching something and don't notice it anymore.
Yeah I have a plasma too, but from everything I've read the burning issue is much less of a concern with the newer TVs, and only has to be guarded against early on (and by the time you do notice any difference with fading pixels, you'll have most likely moved onto a new TV anyway).
Personally I don't really mind the old 4:3 format. It feels a bit less dynamic on my widescreen, but it's just something you have to live with I guess.