Yes, I loved BCT-NDLS Duranto too. One of few trains that actually get you to NDLS, not just Delhi. Another interesting point about this train is that if you make a to & fro journey by this train, you can actually see the whole BCT NDLS stretch in broad day light.
In fact it's quite rare on IR. Most of the long distance trains, a return journey more or less will result in the same stretch during day time. Only other train I can think of is LTT-ERS Duranto.