Cast Iron Pots and Pans

What is it about cooking in cast iron that makes food taste so good?  If you cook a roast in a crock pot or a roaster or the oven, its one taste and usually pretty good, but throw that same roast in a cast iron pot and slow cook it and bam....now we are talking some serious comfort food. 
Is it the heat rentention?  Cast iron retains heat and disperses it evenly through-out the pan for more even cooking.  Think of it this way, your roast will no longer be done uneven.  It could be the seasoning that is within the pan itself.  Cast Iron needs to be seasoned before use.  Some come already pre-seasoned but really, you should season it anyways.  To do this, just take some lard and melt it in the pan to be seasoned.  Once the lard is melted, take a paper towel and spread the lard through out the whole pan covering every inch then put it in the oven for a few hours to cooking to the pan.  Keep in mind, the more you cook with a cast iron pot or pan, the better it becomes..  It won't stick once seasoned properly and the food just taste better.
I watched a cooking show once about the best way to cook a steak.  Here in America we think a grill is the only way to go and there is some merit to that but for a really great steak, throw that peice of meat in a cast iron pan with a bit of butter, season with salt and pepper and fry away.  Try to only flip the meat once for a better, more consistent fry.
I have to admit I don't know alot about cooking with cast iron but it is something I would like to learn more about.  If you have any tips, feel free to post them here.