I still get a small thrill from stepping onto a particularly long escalator (eg the one at Angel tube station in London, which is the 3rd biggest in Western Europe), but then again, my partner often says I'm essentially a five year old trapped in an adult's body.
There is an awesome one at Tokyo Station (Chuo line?) Up about two stories, then horizontal for 10 meters, then up another two stories. Ya, I could spend hours on that one....