Peter nails it!
My 2 cents on this is based on what you've seen and how many times you've seen it.
For me, to see another course around Atlanta won't do too much for me. I know the terrain, I know the grasses, I know the turf, etc. I can see a neat hole, I can see a unique routing twist, but to see something that "amazes" me (and amazed was the term used in the opening post) I need to travel.
I was amazed by the golf in Mullen, NE. I was amazed by the golf in GB&I. Again, this tends to be terrain, grasses, turf quality/firmness, and the like. Based on these factors, the designer/architect can do certain things...some of which can be unique and/or work better under certain conditions.
One of the most unlikely places for me to be amazed at, based on my personal golf experience, was Sweetens Cove. Totally blown away by what was done there.
I haven't been to Australia for golf...I think I might be amazed there. I haven't played a heathland course...not sure I'll be amazed, but I"m sure it will be, at a minimum, very interesting. I might be amazed if I played Painswick. Probably would be amazed at the culture of golf in Japan. Very excited to see the routing at Highlands Links (it might be amazing). What's Devries' new course...Cape Wickham...looks amazing.
Anyway, I'll stop now...as I hope I made my point and don't want to beat a dead horse. For me, I need to see new things to experience true amazement in terms of golf architecture.