Last weekend I played one classic era course - Essex County - and one modern daily fee course - Elks Run, a Greg Norman in Kentucky.
One of the many reasons I enjoyed Essex County more is that it looks like it's been there forever, which of course it has. One of the things I like about older courses no matter who built them is the sense of timelesness, which I don't get with modern courses.
I noticed a quote from Renaisance Design's website on another thread that talked about working the land in order to make the course look older than it is.
What modern courses succeed the most at achieving the sense of timelessness, so that, if you didn't know when they were built, you'd guess they are older than they actually are?