My amateur analysis of each opening hole:
I picked #1 at Bandon Trails because of the dramatic effect of hitting through the dunes on the uphill approach. However, I believe it is too much of a dogleg left off the tee. The same shot can have totally different results because of how narrow that landing area is. In addition, I don't know if it is possible to get close to a front pin. I tried twice with my 56 degree and the ball bounced to the back of the green both times. If you bounce it up, you are taking too much of a risk with the false front. However, all in all, I think the best opener at the resort..
#1 at Old MacDonald is my 2nd favorite opening hole. First, along with Bandon Dunes, it has the best opening tee. Just a classic walk from the trailer to tee and it really gives you the identity of the course from the start as the tee is a continuation of the fairway. Immediately felt like I was playing a Scottish course by this walk and the tee. It is a fairly easy hole, which is not bad for an opener, especially the drive. The approach is fun with the large front bunker, but not too difficult. However, with the wind and green, too many birdies are protected. Very solid hole, just does not have the spectacular feature of BT through the dunes.
#1 at Bandon Dunes was my 3rd favorite. The lack of definition to the right of the fairway I think hurts the hole. In addition, I think the green complex could use some work. The green complexes at #1 and #2 at Bandon Dunes are too similar in how you approach them and putts - one should be modified to create more differences between the two. Again, a solid hole, but nothing too noteworthy either.
#1 at Pacific Dunes is my 4th favorite opener. First, the walk to the first tee is the worst at the resort. I don't know if it was possible, but if it was lower and closer to the pro shop, I think it would have a better feel to it. I love the contours of the fairway and green complex. They are the best of any opener at the resort. However, I am not sure that the fairway bunkers are needed on the right and left of the fairways. The contours of the fairway are so dramatic and the run offs to the right and left are so clear that I think deep swales would have served the hole better than bunkers. By using bunkers, it takes most of the decision making on the tee away from the player - as most players will hit a 3 wood or utility club to make sure that they don't go in them. My caddie immediately took the driver from me on the tee (which I did not like on the first hole of the best golf course that I have ever played). If they were swales, the player would not see the harm as clearly and may be inclined to use a driver more.
Just one man's humble opinion.