I go with the old Nurburgring. I would vote for the old Spa, if that choice were available.
I honestly find all of the "modern" tracks, particularly all of the Tilke abominations, to be featureless snoozefests, reminding me of enlarged kart courses.
I honestly find all of the "modern" tracks, particularly all of the Tilke abominations, to be featureless snoozefests, reminding me of enlarged kart courses.