Skye is attached to the mainland by a bridge and still feels like a crossing. The Cuillin are a serious mountain range. The Trotternish peninsula is the one with the Old Man of Storr and the Quiraing, both extraordinary and both capable of hosting a car park the size of a small town.
Stay on the island. A day trip from Inverness or Fort William is a long drive bookended by disappointment. The light at 7pm is the point of the extra night.
See
The Quiraing or the Storr, not both in a rush
Pick one, start early, and walk past the first viewpoint.
A west-coast beach
Coral Beach near Dunvegan or a quieter bay you find by being willing to park and walk.
Portree, briefly
The coloured harbour is the capital. Buy supplies. Do not spend the only sunny afternoon in a gift shop.
A ferry view, if the timetable smiles
The Small Isles or just the road down to Elgol, where the Cuillin finally explain themselves.