Here are five elements I feel are critical to include in the perfect Potager.
#1 Geometric Beds:
Raised beds are best, edged with cobble stones, bluestone, or wood planks. It's a practical solution, but also adds a lot of beauty. I tend to like symmetry...so it's a perfect way to give the garden a sense of order.
#2 Architectural Features:
Don't underestimate the power of an urn, an arbor, a gate or a pyramid to add structure to a garden. I think architectural elements critical to create a beautiful potager...they will create a focal point or a place for your eye to pause.
# 3 Lovely Paths:
Lovely paths between the beds are a must: pea gravel, bricks, bluestone, grass, or wood chips are all great choices for the paths.
It's a must have here in Connecticut...but fences or walls also add beauty to the garden, providing enclosure and a sense of place...a fence or wall helps to create an outdoor room, in which you want to spend time.
I think these gardens look best with some colorful flowers mixed in with the vegetables. The vegetable plants offer a variation, in size, texture, and shape....but flowers add more visual interest.