For me the issue is time. With work (60+ hrs/week), family and other commitments, not much is left for me. So typically I will get just a Saturday afternoon free. That doesn't leave many options and often a bimble over my brothers house is all I have time for. There is only so much of that you can do and stay keen.
I would love to pick up on aero's again as that is something that doesn't require all day and does keep me interested. The day the T-67 was sold at my local club was a sad day indeed
That said, I will
never give up my PPL as I smile the moment the wheels leave the ground.