There isn't enough time in the day to pick out all the holes I play badly on, so I'll just tell you a select few. I'll try to skip out the obvious ones, too.
CCC 15. 5 bunkers on the drive, raised green means I miss it 90% of the time. If ever I do hit a decent approach, I seem to hit the ridge on the green and bounce off to the left and into the rough. My worst hole, probably, on CCC.
STA 13. Honestly, I play this hole worse than 17. Never know which way to go with the drive as I'm never confident of the medium-flight of my driver clearing the bunkers. This means I don't hit the fairway often enough and leave myself difficult approaches into deviously placed pins. 3-putts common and if I miss the fairway or green I'm scrambling for a bogey.
BPB 5. Quite a few holes I hate on this course, mainly due to my starter balls making any raised green difficult. 7, 9, 10, 15 (obviously) and 17 are also quite heavily disliked, but the heavily bunkered green just makes my approach to 5 impossible, even if I do hit the fairway.
RSG 15. Man, I am ecstatic to come away with par here. A seriously difficult drive followed by a virtually impossible approach to a green which has an incredibly narrow entrance and will reject aboslutely anything short. 9 is another pet-hate. That pin is just evil.
KIA 9. Again, several holes I fear on here; 4, 5, 13, 17. 9, though, just gives me no chance, or so it would seem. I've tried everything - punches, top-spin, back-spin, whatever. I can never get within 20ft, and if I do, I'm short of the green with a tricky chip.
OAK 15. I was tempted to say almost every hole but 15 is probably my worst, barring maybe 9. All the par 3s are tough on Oakmont and the par 5s, especially 12, don't offer a certain scoring chance. However, 15 is just wrong. Most of the time I don't even reach the bunker on the left and have a 3-wood into an undulating green which offers 3-putts (particularly to the front-left pin) aplenty.
Like I said, I could have gone on forever about different holes and different ways of playing them and why they're difficult and what have you, but I hope I've managed to almost keep it close to concise.
Jack.