It's a great conversation. When I think of quirky, I think of courses that incorporate man-made features such as walls, railways, roads, etc. Pebble is blessed with so much more than simply one mile plus of glorious shoreline. The site is entirely natural, including (i) the ditch at 2; (ii) the barranca that begins beneath the third tee, encircles the 16th green & cuts in front 4 tee; (iii) elevation changes throughout that make possible holes like 6 & 14; etc. To me, the most quirky hole at Pebble is 15, where the tee shot must be drawn to avoid ending up on 17 Mile Drive (a car I was driving on the Drive was once struck by a shot that did not conform to the required shape - maybe it's the road that's quirky rather than the golf?).
My question is: would any modern architect, given a topo map of the property and no knowledge of what currently exists, craft a similar routing? How many would dare to build a par 5 with a second shot like the one at 6? Or a downhill 100 yard par 3? Or the 8th, a mid-length par four where it's not uncommon for a golfer's second shot to cover a greater distance than their tee ball? Or a fairway like 9, where (until recently) a bomb off the tee still left the player with a long iron/fairway wood from a hanging lie to a tiny green with death scant yards to the right?
It's often written that the inland holes at Pebble are inferior. I agree with TD when his first Golf Course Confidential referred to 12 as (IIRC) "Hamburger Helper". That said, I think all of the rest are holes of merit. I have played PB 8 times and have treasured every hole of every loop. Watching the telecast makes me want to dust off the clubs I stowed five years ago. I can't think of anywhere else that evokes that emotion.