I gave up my PPL because when I really gave it some honest thought, I concluded I really wasn't that good at it. I was competent enough to solo after 8 hours and GFT at 43 hours, but it never seemed that, in the parlance, I strapped in and became part of the aircraft. I could "operate it" but not really "fly it". After 77 hours, it seemed that I wasn't much more proficent than I was at the GFT, so I decided I should stop before I did something more embarrssing than being a bit late on the round out now and again.
I wonder how many people who quote "economics" and job or family constraints as the reason they quit, did not also reach the same conclusion, but didn't want to admit it to themselves - or peers and significant others?