I must be a nostalgic! It all started with Kings on the Snow Hill-Paddington expresses in the 1950s. The Kings had to pull hard going south from Princess Risborough. Then fast forward to an irregular Chiltern commute from Warwick Parkway to Marylebone on the first leg of a journey to West Africa via Paris 15 years ago (one time the train rain out of fuel at Gerrards Cross, causing me to plead to transfer to a sardine packed local stopping train). Then the introduction of the new locomotives, very stylish. Now well and truly retired and living in Hampshire I would still recommend the journey to anyone.
BTW, The loco has to be at the DOWN end of the train to avoid polluting Marylebone. Are us Brummies expected to put up with the fumes at Moor Street? Well, we are indeed a tougher lot!