Half Windsor is still more in fashion and still produces a neat, symmetrical knot. Beware, though, after learning a good knot you will see the four in hand knot everywhere and it will annoy you.
I've been using the Full Windsor since my dad taught it to me when I was 13. I'm not much one for fashion, but I think it's a timeless knot. Apparently James Bond didn't think much of it though. :-)
