I covered all the basics in my various training courses (microlight, then NPPL, then JAR PPL), but some things which I use in my flying now weren't really addressed in training in any depth: mainly things which become relevant when you leave the local area - flight plans; controlled airspace transits; use of flight levels and the quadrantal rules (and the differences with neighbouring countries) etc.
The microlight training doesn't really cover long-distance travel stuff much, and by the time I did the A Group courses I'd taught myself anyway, so maybe it would have been explained in more depth if I'd done them ab initio.
I did do some full spin training though, and some lessons in mountain flying while on holiday in New Zealand which I've sadly not been able to put to use around London yet, though the soaring craggy peaks of the Chilterns hold less fear for me now than they once did.
