Here's a good one:

CREAMY MUSTARD VINAIGRETTE DRESSING

1/3 c. olive oil
1/4 c. red wine vinegar
1 tbsp. sugar
1 tsp. prepared mustard
1/2 tsp. coarsely ground pepper
1/2 tsp. salt

In small bowl with wire whisk or fork mix all ingredients. I use a small jar with cover and shake the ingredients.

If you make your own dressing, it would be worth while to buy some of the ingredients...
The basic Oil and vinegar dressing is 1/4 cup of something sour....vinegar of some sort or lemon juice or another citrus....and 1/2 cup of oil...I like olive oil...s and P to taste.
Some like sugar....some add mustard and some add herbs.
If you like good seasons, you must like a salty dressing with very little sugar....that right?
Any dressing will only be as good as the ingredients....good oil and a lovely champagne vinegar makes a good dressing.

Why not experiment? Make a small portion of the basic vinagrette, and add what you have on hand to see what you like.
Balsamic vinegar or rice vinegar adds a lovely flavor to oil and vinegar dressings, I think.