You open to anything, or are you thinking dill or bread & butter or sweet?
I've only pickled a few times, including freewheelin' a batch of sweet relish last year. Based it on diced cucumber and onion, vinegar (can play with the type(s), touch of salt, sugar, mustard seed and whatever spices that were within reach that seemed like a match. I think there was some dill seed. Don't remember if there was any bell pepper. My wife tackles a variety of things, including pickling tomatoes -- that one includes a ton of garlic cloves.
Basically just taste the pickling liquid as you go, and tweak to keep it in line with your taste preferences.
With all that being said, I'm sure a few pros will see this tonight and give real ratios, etc.