Class 317 - The 317 looked extremely strange when I first saw it while on Hackney Down some years ago. As it was so similar to the 455, I seem to remember thinking "what an earth is that!!", LOL!!!.
Class 319 - The crèche livery was interesting and suited them. I also like the old bar that still remains on the 319/2. The FCC livery is dreadful though, doesn't suit them at all.
Class 365 - Waiting for the train to Elmers End at London Bridge one Saturday, what comes in but one of these. As with the 465/9 of today, they clearly didn't stick to mainline workings.
Class 375 - I only really put this down for 375 608/610/624/705.
Class 411 - "Kent Coast". Thats what I would call them when I was younger, probably because of the small stickers on the side.
Class 455 - Probably one of the first units I ever rode on. Never been overly keen on the refurbed front, SWT ones look much better in my opinion.
Class 456 - Again, have been using these for as long as I can remember.
Class 465/466 - The whine as they pull in/pull away will always make these one of my favourites.