I have not played TGC enough to form an opinion that is in any way authoritative. Nevertheless, I think some of the love for TGC comes from it's mystique, atmosphere, attitude and exclusivity. Certainly there are some great architectural features (the early use of railroad ties and the raised shelf on the approach to 10 green (I think it's on 10 anyway). But the property is not the greatest, in my opinion. Central Ohio generally lacks the terrain that you find in Cleveland and in Cincinnati. Central Ohio is relatively flat, so I don't think that TGC has the use of elevation that you'll find at Canton Brookside or Kirtland, for example.
But what you will find at TGC is a pure golf club. The members don't tolerate slow play. The clubhouse is absolutely no frills, almost Spartan, yet it still offers all you would want in a clubhouse and locker room. Nothing is flashy or overstated. TGC is just "there.". And when you combine the atmosphere with the early Dye design, it just works.
Just my take, for what it's worth.
I'm curious how folks would compare TGC to another place that seems to be very low key--Camargo.