Rails (with black iron) and benches (perhaps benches can be made after).
Built in benches
2 tone decking (looks like composite). Colors similar to our house. The Pergola with slatted, horizontal rails. Would want to include lights (at least on rail posts and steps - maybe solar lights).
Stones around deck.
Horizontal rails. Flat rail top all the way around.
if we consider Pergola over door, attached to house
The storage bench (could make a lower one)
2 toned (riser vs. decking)