I have a garden variety Lodge that I seasoned myself.
I think everything has its uses and both cast iron and a good quality non stick have their place in my kitchen.
I don't want to spend the money loading up a cast iron skillet with energy (and subsequently heating up the kitchen, not so bad in winter of course) and then cleaning and re-seasoning it just to fry a couple of eggs when my 10" All-Clad non stick will do the job just fine. However when its time to fry hash browns I need something with some thermal inertia. Same goes for chile rellenos. Any heavier frying jobs go to the deep fryer.
I recently bought a heavy cast iron griddle for my grill and I use it all the time. Burgers (Cooks Illustrated summer 2008 Drive in burger recipe--yum), bacon, eggs and hash browns (even better than the skillet) pork rib chops (last night- yum) or lust leave it in like a pizza stone when using indirect heat. I cook outside whenever I can and the griddle really helps.
I have had sets of cast iron that I got rid of, one not even seasoned, because I was young and moved a lot and couldn't see hauling around so much weight that I wasn't using. I don't know if any of it was vintage and I wish I had kept it now.