I’d have to agree with all of those. Indeed it’s very hard to choose between the 1950s/60s EMUs. 302, 303, 304, 305, 307, 308, 415, 416, 421 and 423 all lovely in my view.
Personally I never quite saw what was so good about 309s, though to be fair I hardly ever went on one. I’ve also missed out 411 as the refurbishment spoiled these, though from pictures of them in pre-refurb condition (which sadly I never experienced) they look like they were very nice indeed.
However I do have a soft spot for some newer classes. 365 is top of my list, though they have been dumbed down upon refurbishment (interesting how over the years there’s more than one example of refurbishments spoiling good units). 323s I have a soft spot for, as they’re a good simple design that happens to sound nice too, and to be fair Electrostars are pretty nice really, especially the earlier versions and the Connex interior variants in particular). 317 has to be on the list too, and perhaps 333 as well.
Perhaps it’s easier to list which classes I *don’t* like, though unfortunately many of the EMUs we’re seeing enter service at the moment might be on this list. Some recent classes have been pretty poorly specified IMO. Something like the 700 is an excellent concept but spoiled by a lousy interior.
One person’s dingy is another’s luxury!