Cook the Pasta: Bring a large pot of salted water to a rolling boil. Add the macaroni and cook according to package instructions for 8-10 minutes until al dente. Drain and rinse under cold water.

Prepare the Dressing: In a mixing bowl, combine mayonnaise, white vinegar, and sugar. Whisk until smooth and taste for balance.

Combine Ingredients: In a large bowl, add the cooled macaroni, diced bell peppers, celery, and other desired vegetables. Fold together gently.

Dress the Salad: Pour the dressing over the mixture and mix until everything is evenly coated with dressing. Adjust seasonings as necessary.

Chill and Serve: Cover and refrigerate for at least 30 minutes to allow flavors to meld before serving.