Most exhilarating ride - A mid-1970s BR excursion from Birmingham to Edinburgh, Class 86 + Mk1 carriage 'excursion set'. Last passenger stop Wolverhampton - after that it went like the proverbial bat-out-of-hell over the twists and turns of the northern WCML, getting to Carstairs over an hour early...
Most unexpected - On a group enthusiast trip to Chicago area, we were booked to visit the Wisconsin Central workshops and yard at Fond-du-Lac (north of Milwaukee). Expecting to have to drive there and back from Chicago, WC decided to surprise us by laying on a private train (completely free!) to take us there and back! Two very nice business cars (one of them a dome car) hauled by an EMD GP40. Food, drink, and open porches/balconies on the cars
. It doesn't get much better than a free ride standing on an open balcony a few feet behind a 3000hp GP40 as it accelerates away...
Most scenic - Pretty much any journey through the Alps. Last year we did Lugano - Göschenen (on SBB) - Andermatt - Brig (on FOB) - Kandersteg - Spiez - Zweisimmen (on BLS) - Gstaad - Montreux (on MOB) - Geneva (SBB), weaving back and forth across the Swiss Alps over the course of a week, and also doing some walking in them.
Bit of everything - Skagway to White Pass summit (Alaska) on the 'White Pass and Yukon' railroad. A long train of old-fashioned (looking) passenger cars with open balconies at the ends, heated with wood-burning stoves. A pair of lusty, great looking, very noisy, diesels on the front and miles of 4% gradients to climb to reach the snowy summit. Poor weather (rain and very low cloud) but unforgettable.