Variety
interesting length holes 260 par 3's,87 yard par 3's, 490 uphill par 4's that require two woods, others that are reachable.
Playing a routing over, around, and throughout the property rather than hiking to a series of elevated tees/views or to hit a prespecified place for a certain hole (9 or 18)
Unusual landforms used in the golf course.
A course that fits into its surroundings and APPEARS to be simply constructed or found.
Hazards to be considered that are contained within the intended golf course area-not at the perimeters to penalise your errors(bonus points for indiginous playable hazards such as native light scrub, broken ground, dunes, etc. but also crevices, railroad tracks, gorse, heather, creeks)
Scenery-(unusual vegetation, views as backdrop, looks across the course, looks off the course)
Choices off the tee
Interesting and varied greensites with varieties-elevated, angled away, greens at grade, punchbowl, benched into hills, tilt inducing strategy
a course where occasionally a hazard is to be avoided with a wide angle reducing wide berth, or other holes where there is a preferred position, but being out of position is its own penalty but not so obviously, and also tee shot friendly holes that allow total freedom to let go to gain more advantage via power, and finally the odd hole or two where accuracy itself is it's own reward and wilder hiiters may need to choose a super safe play.
Such a course could be quite difficult (The island or Long Cove) or quite gettable in the right conditions (Northwest, Southampton,North Berwick)