I don't know where you've already been, but I could highly recommend spending some time in the USA. Flying is a lot cheaper there than in the UK, and there is some fabulous scenery to see/fab places to go.
I'm living a permanent series of Gap Years now (semi-retired) and the US trips are still the highlights.
If you plan it right and get the right visas, you could even get yourself an FAA PPL/IR (they call it Private Pilot/Instrument Airplane over there).
Needs a supply of money, mind.
OR .. forget the flying, and spend a chunk of time on VSO - Tanzania, for example. Puts life and the ratrace into perspective.