I fell in love with Mallard the first time I saw her as a child. Over the last 40+ years I've given her hugs each time I've visited the NRM. I'm fond of the Deltic, Classes 47 and 37 but the blue streak is in a class of its own.
My personal favourite steam engine is the A4 Silver Link, i haven’t seen it besides this one time when LaZer Jet was doing a ts2017 video of all the A4 trains he had in a race. Not gonna lie, it shouldn’t have been scrapped back in 1963, they should’ve preserved it in the National Railway Museum in York.