I had a big post typed out and lost it...grrr. So here's the more concise version...
Repeat plays are great and certainly preferable, but I'm ok with opinions coming from one round on the macro elements of a course. I can see how those who are most interested in the micro elements would have a problem with that. To each their own. I feel justified in having an opinion on a golf course after one play, but try to avoid being offended if someone disagrees or finds my opinion to be irrelevant. I still believe most of this is pretty subjective anyway.
Mac,
I would agree there. My golfing methods are a bit odd. I played over 200 tournaments before I turned 18, so I understand the other perspective as well. I'm ok with looking at the big picture of a course, because I don't think one ever understands every little nuance of a course. They are living, dynamic things in many ways, so there's always something to learn.
Brent,
Some option holes are better than others. Valhalla #7 intrigues me, because the long knocker pros can all go left and make the hole look silly, when the vast majority of amateurs are better served going right because the risk is so high for not pulling off perfect shots going left. I don't think its a great hole, but I give it some points for at least providing the option. Most golfers will always make the same decision, however, depending on their ability. The better option holes create more variety based on wind or pin placement. I think the difference is often apparent in one play, but I'm sure I miss some too.