Used to commute from Kings Cross and have to say for me the 365 was the finest design for an EMU
Absolutely, quite a few on here agree with that.
Any design is a compromise between different constraints - maximising seating capacity and comfort versus providing adequate standing room, including getting on and off the train. The 365 achieves this exceptionally well, which is why they've always been at home on metro, outer suburban and express work.
The recent refurbishment has spoiled them a little by removing carpet and providing a slightly less pleasing seating layout, as well as harsh LED lighting, but they still very pleasant to use.
It's interesting that the Northern 323s also seem quite popular, being outwardly quite a similar design.