I can only point to various moments where I've had my eyes opened further as I've always envisioned golf holes where ever I've driven and sketched holes since I've maybe junior high. If I may...
1) Playing Ross' excellent Springfield Country Club (OH) as a youth with member friends and being shocked by his greensites which are either beautifully benched into a hill with severe back to front slope, slightly built up on the flatter terrain with mostly open fronts allowing for ground options, or, in the case of the 8th hole, a glorious skyline green on top of a hill falling off on three sides on a short down and up par-4. I once made a 25' putt aiming 180 degrees away from the hole (ball probably traveled over 40') on #8 for birdie in a 6-man (3v3) 9-hole scramble match to go one-up. Then, made a 35-footer with at least 10' of break on the last. I just marveled at how much fun those putts were make (or miss). SCC's greens are largely unknown by most on GCA and I'd encourage anyone here to pay a visit. Probably the course I'd pick to play for the rest of my life if I had to.
2) Working as a PGA Apprentice in VT 15 years ago I bought Doak's Guide and began to seek out interesting courses much more intentionally playing Ekwanok & Yale among other New England gems further inspired me.
3) Playing St. Enodoc while in England for my brother's wedding 11 years ago was extraordinary.
4) Stumbling onto GCA.com 10 years ago.
5) Working at Carmel Valley Ranch the summer before moving overseas and being lucky enough to play Cypress Point and Pasatiempo. The former gets my #1 and always will.
6) Living in Surrey for a year a few years later and playing tons of great Heathland golf all over Surrey and an Open Qualifier up in Leeds at Alwoodley while also heading SE to Deal and ferrying from Wales to Ireland. My game got to be so much better playing on F&F. BIG YEAR.
7) Walking Cape Breton Highlands twice in 6 hours and having an absolute blast on my honeymoon.
Caddying for 5 months at Bandon Dunes was the ultimate up to now. Truly the finest GCA education one can hope for with the variety of courses, the conditioning, and the weather. Getting someone else around such courses is invaluable to the understanding of the subtleties of each and, I would argue, to true links golf.
9) Attending The Masters. The scale took me back to memories of Yale!
Cumulatively, these experiences have formed my interest and diverse preferences in GCA. I'd hope I'm lucky enough to experience 9 more! Sorry for going on and on and....