Starter and ridge materials
Edges and ridge lines need the pieces and fastening pattern specified for the selected system. These details are not interchangeable decoration.

Choose a shingle for its construction, appearance and tested performance. Those are separate decisions, and each belongs in the roof plan.
Three-tab, architectural and designer describe different shingle constructions and appearances. An impact rating describes a tested performance characteristic. A shingle can be architectural and impact-rated at the same time.
The right choice also has to fit the slope and the rest of the roof assembly. A shallow porch section may need a different covering even when the main roof is shingled.
Impact-resistant products are tested under defined laboratory conditions. A higher test classification does not make a roof hail-proof or guarantee an insurance discount. The material still depends on correct installation and the rest of the assembly.
A change in profile or color should also suit the house. On a property subject to historic design review, the proposed appearance belongs in that conversation before materials are ordered.

The shingle is one part of the water-shedding system.
Edges and ridge lines need the pieces and fastening pattern specified for the selected system. These details are not interchangeable decoration.
The layers beneath the shingle and around roof interruptions redirect water that reaches those details. A new shingle cannot repair failed flashing below it.
A sound base supports the fasteners. Ventilation needs to work with the actual roof and attic arrangement rather than being chosen by the appearance of a roof vent.
No. Architectural describes the layered construction and appearance. Impact resistance is a separate tested rating on a specific product.
Weathering, color batches and discontinued products can make an exact match difficult. That affects the appearance of a repair, even when a compatible repair material is available.
Removal, access, damaged decking, flashing and roof complexity affect the project total. The roof cost guide explains why a price based only on shingle bundles misses much of the job.

A free inspection can establish the roofing scope before you choose the finished look.