I'm sure the narrows is a great day hike ... But if you want something more challenging, more scenery, more diversity, more wildness then the trans-Zion hike is 100% awesome. The highlight (ignoring angels landings and all it's crowds) is the west Rim Trail. Walk alongside the edge of a canyon for 2 miles of jaw dropping views. Camp on top, see the sunset, see the dawn, see unparalleled night skies. Just do it!