We've had our dining room table ever since we moved into our house, which has been about 9 years now. It's nothing too special really, but a solid piece of furniture nonetheless. The finish is black with a bit of subtle distressing, and it has a hidden butterfly leaf allowing it to expand to 54x54" (although we usually keep it to the smaller 36x54").
The table is also counter-height (36"), which worked out really well back when we had a wall separating our dining and living room as seen above. We had initially cut out this window opening in the wall in order to connect the two spaces a bit more (and let's be honest, in order to be able to watch TV while we ate). Anyway, the counter-height table allowed us to easily see through the window into the living room and have conversations with anyone else sitting in there.