Hi Paul
I think I'm the same as you insofar as you feel that flying has lost any PURPOSE.
You've done all you set out to achieve - in 180 hours whereas it might take many several years or a lifetime in private flying to visit the places you have flown to.
Maybe you're easily bored and constantly need new experiences rather than repeat that which has gone before?
If you take away the 'airline route' and finances are limited then maybe microlights and gliding are an option, as suggested by others.
Not just gliding - but maybe the 'excitement' of achieving badges would provide a new purpose - silver, gold, diamonds?
When I had 180 hours and an PPL/RT/Night/IMC I was about to embark on my airline career through the 'self-improver' route - MEP/BCPL/FI/IR/CPL/ATPL/FE on pistons, turboprops and jets.
Now it's over and I feel like you - no purpose.
I don't think you have the passion, so unless you can find a purpose through further training and achievement it's probably time to move on.
All the best in any event.